Bar Charts DI – Medium Level

If you want a good score in Unit 7 (Data Interpretation), you must train your brain to do 2-step calculations quickly. In this Bar Chart DI – Medium Level set, questions include ratios, percentage share, average-based comparisons, and small multi-step logic. Practice daily for 15–20 minutes, and aim for 1 DI set per day so that calculations become automatic under exam pressure.

DI Set 1: Graph DI (Bar Graph: Monthly Enrollments – Jan to May)

Data:

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xychart-beta
    title "Bar Graph: Monthly Enrollments - Jan to May"
    x-axis ["Jan","Feb","Mar","Apr","May"]
    y-axis "Enrollments" 0 --> 360
    bar [240,260,300,330,310]

Questions (MCQ):
Q1: What is the total enrollments in March and April together?
A) 620;
B) 630;
C) 640;
D) 650;

Q2: What is the percentage increase in enrollments from January to April?
A) 35.0%;
B) 36.5%;
C) 37.5%;
D) 38.5%;

Q3: What is the ratio of May enrollments to February enrollments?
A) 13:10;
B) 31:26;
C) 26:31;
D) 62:52;

Q4: What is the average enrollments from February to April?
A) 295.67;
B) 296.67;
C) 297.67;
D) 298.67;

Q5: What is the difference between (April + May) and (January + February)?
A) 130;
B) 140;
C) 150;
D) 160;

Answers and Explanations:
Answer (Q1): B) 630
Explanation:
March = 300 and April = 330.
300 + 330 = 630.

Answer (Q2): C) 37.5%
Explanation:
Increase = 330 − 240 = 90.
% increase = (90 ÷ 240) × 100 = 37.5%.

Answer (Q3): B) 31:26
Explanation:
May:Feb = 310:260.
Divide both by 10 → 31:26.

Answer (Q4): B) 296.67
Explanation:
Total = 260 + 300 + 330 = 890.
Average = 890 ÷ 3 = 296.67.

Answer (Q5): B) 140
Explanation:
(Apr+May) = 330+310 = 640.
(Jan+Feb) = 240+260 = 500.
Difference = 640 − 500 = 140.

DI Set 2: Graph DI (Bar Graph: Annual Department Budget – College A)

Data:

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xychart-beta
    title "Bar Graph: Annual Department Budget - College A"
    x-axis ["Library","Lab","Sports","Maintenance","Scholarships"]
    y-axis "₹ Lakhs" 0 --> 20
    bar [12,18,9,15,16]

Questions (MCQ):
Q1: What is the total budget of Lab and Scholarships together (₹ Lakhs)?
A) 33;
B) 34;
C) 35;
D) 36;

Q2: What percentage of the total budget is for Maintenance?
A) 20.00%;
B) 21.43%;
C) 22.50%;
D) 23.00%;

Q3: What is the ratio of Lab budget to Sports budget?
A) 1:2;
B) 2:1;
C) 3:2;
D) 4:1;

Q4: By what percentage must Sports budget increase to become equal to Maintenance?
A) 60.00%;
B) 66.67%;
C) 70.00%;
D) 75.00%;

Q5: What is the average budget of all departments except Library (₹ Lakhs)?
A) 14.0;
B) 14.5;
C) 15.0;
D) 15.5;

Answers and Explanations:
Answer (Q1): B) 34
Explanation:
Lab = 18 and Scholarships = 16.
18 + 16 = 34.

Answer (Q2): B) 21.43%
Explanation:
Total = 12+18+9+15+16 = 70.
% = (15 ÷ 70) × 100 = 21.43%.

Answer (Q3): B) 2:1
Explanation:
Lab:Sports = 18:9.
Divide both by 9 → 2:1.

Answer (Q4): B) 66.67%
Explanation:
Increase needed = 15 − 9 = 6.
% increase = (6 ÷ 9) × 100 = 66.67%.

Answer (Q5): B) 14.5
Explanation:
Exclude Library: total = 18+9+15+16 = 58.
Average = 58 ÷ 4 = 14.5.

DI Set 3: Graph DI (Bar Graph: Page Visits on a Website – Yesterday)

Data:

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xychart-beta
    title "Bar Graph: Page Visits on a Website - Yesterday"
    x-axis ["Home","Blog","Courses","Test Series","Contact"]
    y-axis "Visits (K)" 0 --> 100
    bar [85,60,75,50,30]

Questions (MCQ):
Q1: What is the total visits of Home and Courses together (in thousands)?
A) 155;
B) 160;
C) 165;
D) 170;

Q2: What percentage of total visits is the Home page?
A) 27.33%;
B) 28.33%;
C) 29.33%;
D) 30.33%;

Q3: What is the ratio of Blog visits to Contact visits?
A) 1:2;
B) 2:1;
C) 3:1;
D) 4:3;

Q4: If Courses visits increase by 20%, what will be the new Courses visits (in thousands)?
A) 85;
B) 88;
C) 90;
D) 95;

Q5: What is the difference between (Home + Blog) and (Test Series + Contact) visits (in thousands)?
A) 55;
B) 60;
C) 65;
D) 70;

Answers and Explanations:
Answer (Q1): B) 160
Explanation:
Home = 85 and Courses = 75.
85 + 75 = 160.

Answer (Q2): B) 28.33%
Explanation:
Total = 85+60+75+50+30 = 300.
% = (85 ÷ 300) × 100 = 28.33%.

Answer (Q3): B) 2:1
Explanation:
Blog:Contact = 60:30.
Divide both by 30 → 2:1.

Answer (Q4): C) 90
Explanation:
20% of 75 = 0.20 × 75 = 15.
New = 75 + 15 = 90.

Answer (Q5): C) 65
Explanation:
(Home+Blog) = 85+60 = 145.
(Test Series+Contact) = 50+30 = 80.
Difference = 145 − 80 = 65.

DI Set 4: Graph DI (Bar Graph: Factory Production – 5 Working Days)

Data:

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xychart-beta
    title "Bar Graph: Factory Production - 5 Working Days"
    x-axis ["Day 1","Day 2","Day 3","Day 4","Day 5"]
    y-axis "Units" 0 --> 550
    bar [420,380,450,500,470]

Questions (MCQ):
Q1: What is the total production in all 5 days?
A) 2200;
B) 2210;
C) 2220;
D) 2230;

Q2: What is the percentage increase from Day 2 to Day 4?
A) 30.58%;
B) 31.58%;
C) 32.58%;
D) 33.58%;

Q3: What is the average production from Day 3 to Day 5?
A) 470.33;
B) 472.33;
C) 473.33;
D) 474.33;

Q4: What is the ratio of Day 4 production to Day 1 production?
A) 5:4;
B) 25:21;
C) 21:25;
D) 50:42;

Q5: What is the difference between Day 5 production and the average of Day 1 and Day 2?
A) 60;
B) 65;
C) 70;
D) 75;

Answers and Explanations:
Answer (Q1): C) 2220
Explanation:
420+380=800, 800+450=1250.
1250+500=1750, 1750+470=2220.

Answer (Q2): B) 31.58%
Explanation:
Increase = 500 − 380 = 120.
% increase = (120 ÷ 380) × 100 = 31.58%.

Answer (Q3): C) 473.33
Explanation:
Total = 450 + 500 + 470 = 1420.
Average = 1420 ÷ 3 = 473.33.

Answer (Q4): B) 25:21
Explanation:
Day4:Day1 = 500:420.
Divide both by 20 → 25:21.

Answer (Q5): C) 70
Explanation:
Average of Day1 & Day2 = (420+380) ÷ 2 = 400.
Difference = 470 − 400 = 70.

DI Set 5: Graph DI (Bar Graph: Marks of 5 Students – Unit 7 Test)

Data:

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xychart-beta
    title "Bar Graph: Marks of 5 Students - Unit 7 Test"
    x-axis ["A","B","C","D","E"]
    y-axis "Marks" 0 --> 90
    bar [68,74,80,72,76]

Questions (MCQ):
Q1: What is the total marks of B, D, and E together?
A) 220;
B) 222;
C) 224;
D) 226;

Q2: What is the average marks of the class (all 5 students)?
A) 73;
B) 74;
C) 75;
D) 76;

Q3: By what percentage is C’s marks higher than A’s marks?
A) 16.65%;
B) 17.65%;
C) 18.65%;
D) 19.65%;

Q4: What is the ratio of E’s marks to B’s marks?
A) 37:38;
B) 38:37;
C) 19:18;
D) 76:74;

Q5: If the pass mark is 75, how many students passed and what percentage of the class passed?
A) 2 students, 40%;
B) 2 students, 50%;
C) 3 students, 60%;
D) 1 student, 20%;

Answers and Explanations:
Answer (Q1): B) 222
Explanation:
B + D + E = 74 + 72 + 76.
Total = 222.

Answer (Q2): B) 74
Explanation:
Total = 68+74+80+72+76 = 370.
Average = 370 ÷ 5 = 74.

Answer (Q3): B) 17.65%
Explanation:
Difference = 80 − 68 = 12.
% higher = (12 ÷ 68) × 100 = 17.65%.

Answer (Q4): B) 38:37
Explanation:
E:B = 76:74.
Divide both by 2 → 38:37.

Answer (Q5): A) 2 students, 40%
Explanation:
Passed (≥75): C (80) and E (76) → 2 students.
% passed = (2 ÷ 5) × 100 = 40%.

DI Set 6: Graph DI (Bar Graph: Webinar Registrations by City – April 2025)

Data:

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xychart-beta
    title "Bar Graph: Webinar Registrations by City - April 2025"
    x-axis ["Mumbai","Delhi","Hyderabad","Chennai","Kolkata"]
    y-axis "Registrations" 0 --> 600
    bar [520,480,420,360,220]

Questions (MCQ):
Q1: What is the total registrations in Mumbai, Delhi, and Chennai together?
A) 1340;
B) 1350;
C) 1360;
D) 1370;

Q2: What percentage of total registrations came from Mumbai?
A) 24%;
B) 25%;
C) 26%;
D) 27%;

Q3: What is the ratio of Hyderabad registrations to Chennai registrations?
A) 6:7;
B) 7:6;
C) 5:4;
D) 4:5;

Q4: If Kolkata registrations increase by 25%, what will be the new total registrations (all cities)?
A) 2045;
B) 2055;
C) 2065;
D) 2075;

Q5: What is the difference between the average of (Mumbai, Delhi) and the average of (Chennai, Kolkata)?
A) 200;
B) 205;
C) 210;
D) 215;

Answers and Explanations:
Answer (Q1): C) 1360
Explanation:
Mumbai + Delhi = 520 + 480 = 1000.
1000 + Chennai (360) = 1360.

Answer (Q2): C) 26%
Explanation:
Total = 520+480+420+360+220 = 2000.
% = (520 ÷ 2000) × 100 = 26%.

Answer (Q3): B) 7:6
Explanation:
Hyderabad:Chennai = 420:360.
Divide both by 60 → 7:6.

Answer (Q4): B) 2055
Explanation:
25% of 220 = 55, so new Kolkata = 220 + 55 = 275.
New total = 2000 − 220 + 275 = 2055.

Answer (Q5): C) 210
Explanation:
Avg(Mumbai, Delhi) = (520+480) ÷ 2 = 500.
Avg(Chennai, Kolkata) = (360+220) ÷ 2 = 290.
Difference = 500 − 290 = 210.

DI Set 7: Graph DI (Bar Graph: Quarterly Sales by Product – Q1 2025)

Data:

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xychart-beta
    title "Bar Graph: Quarterly Sales by Product - Q1 2025"
    x-axis ["A","B","C","D","E"]
    y-axis "₹ Lakhs" 0 --> 260
    bar [180,220,160,240,200]

Questions (MCQ):
Q1: What is (Sales of B + Sales of D) minus Sales of C (₹ Lakhs)?
A) 290;
B) 300;
C) 310;
D) 320;

Q2: What percentage of total sales is Product D?
A) 22%;
B) 23%;
C) 24%;
D) 25%;

Q3: What is the ratio of Product D sales to Product C sales?
A) 2:3;
B) 3:2;
C) 4:3;
D) 5:4;

Q4: By what percentage must Product C increase to become equal to Product A?
A) 10.0%;
B) 11.5%;
C) 12.5%;
D) 13.5%;

Q5: What is the average sales (₹ Lakhs) of the top 3 products (D, B, and E)?
A) 215;
B) 220;
C) 225;
D) 230;

Answers and Explanations:
Answer (Q1): B) 300
Explanation:
B + D = 220 + 240 = 460.
460 − C (160) = 300.

Answer (Q2): C) 24%
Explanation:
Total = 180+220+160+240+200 = 1000.
% of D = (240 ÷ 1000) × 100 = 24%.

Answer (Q3): B) 3:2
Explanation:
D:C = 240:160.
Divide both by 80 → 3:2.

Answer (Q4): C) 12.5%
Explanation:
Increase needed = 180 − 160 = 20.
% increase = (20 ÷ 160) × 100 = 12.5%.

Answer (Q5): B) 220
Explanation:
Top 3 (D+B+E) = 240 + 220 + 200 = 660.
Average = 660 ÷ 3 = 220.

DI Set 8: Graph DI (Bar Graph: Research Papers Published by Department – 2024)

Data:

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xychart-beta
    title "Bar Graph: Research Papers Published by Department - 2024"
    x-axis ["CS","Physics","Chemistry","Maths","English"]
    y-axis "Papers" 0 --> 70
    bar [56,44,36,40,24]

Questions (MCQ):
Q1: What is the total number of papers published by CS, Physics, and Mathematics together?
A) 132;
B) 136;
C) 140;
D) 144;

Q2: What percentage of total papers is (Chemistry + English) together?
A) 28%;
B) 29%;
C) 30%;
D) 31%;

Q3: What is the ratio of CS papers to English papers?
A) 5:2;
B) 7:3;
C) 8:3;
D) 3:7;

Q4: If every department increases its papers by 10%, what will be the new total papers?
A) 210;
B) 215;
C) 220;
D) 225;

Q5: What is the difference between (CS + Physics) and (Chemistry + English)?
A) 35;
B) 40;
C) 45;
D) 50;

Answers and Explanations:
Answer (Q1): C) 140
Explanation:
CS + Physics = 56 + 44 = 100.
100 + Maths (40) = 140.

Answer (Q2): C) 30%
Explanation:
Chemistry + English = 36 + 24 = 60.
Total = 56+44+36+40+24 = 200.
% = (60 ÷ 200) × 100 = 30%.

Answer (Q3): B) 7:3
Explanation:
CS:English = 56:24.
Divide both by 8 → 7:3.

Answer (Q4): C) 220
Explanation:
Total papers = 200.
10% increase means new total = 200 × 1.10 = 220.

Answer (Q5): B) 40
Explanation:
(CS+Physics) = 56+44 = 100.
(Chemistry+English) = 36+24 = 60.
Difference = 100 − 60 = 40.

DI Set 9: Graph DI (Bar Graph: Electricity Units Used by Hostel Blocks – May 2025)

Data:

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xychart-beta
    title "Bar Graph: Electricity Units Used by Hostel Blocks - May 2025"
    x-axis ["Block A","Block B","Block C","Block D","Block E"]
    y-axis "Units" 0 --> 400
    bar [320,280,360,240,300]

Questions (MCQ):
Q1: What is (Units of Block A + Block E) minus Units of Block B?
A) 330;
B) 340;
C) 350;
D) 360;

Q2: What percentage of the total units is Block D?
A) 14%;
B) 15%;
C) 16%;
D) 17%;

Q3: What is the ratio of Block C units to Block B units?
A) 7:9;
B) 9:7;
C) 8:7;
D) 10:7;

Q4: If Block D reduces its usage by 15%, what will be the new total units (all blocks)?
A) 1454;
B) 1464;
C) 1474;
D) 1484;

Q5: What is the average units used by Blocks A, C, and E?
A) 325.67;
B) 326.67;
C) 327.67;
D) 328.67;

Answers and Explanations:
Answer (Q1): B) 340
Explanation:
A + E = 320 + 300 = 620.
620 − B (280) = 340.

Answer (Q2): C) 16%
Explanation:
Total = 320+280+360+240+300 = 1500.
% of D = (240 ÷ 1500) × 100 = 16%.

Answer (Q3): B) 9:7
Explanation:
C:B = 360:280.
Divide both by 40 → 9:7.

Answer (Q4): B) 1464
Explanation:
15% of 240 = 36, so new D = 240 − 36 = 204.
New total = 1500 − 240 + 204 = 1464.

Answer (Q5): B) 326.67
Explanation:
A + C + E = 320 + 360 + 300 = 980.
Average = 980 ÷ 3 = 326.67.

DI Set 10: Graph DI (Bar Graph: Tickets Sold for 5 Events – Cultural Fest)

Data:

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xychart-beta
    title "Bar Graph: Tickets Sold for 5 Events - Cultural Fest"
    x-axis ["Event 1","Event 2","Event 3","Event 4","Event 5"]
    y-axis "Tickets" 0 --> 2200
    bar [1500,1700,1200,2000,1600]

Questions (MCQ):
Q1: What is the total tickets sold for Event 2, Event 4, and Event 5 together?
A) 5200;
B) 5300;
C) 5400;
D) 5500;

Q2: What percentage of total tickets sold is Event 4?
A) 23%;
B) 24%;
C) 25%;
D) 26%;

Q3: What is the ratio of Event 2 tickets to Event 3 tickets?
A) 12:17;
B) 17:12;
C) 7:5;
D) 34:25;

Q4: If Event 3 increases by 20% and Event 1 decreases by 10%, what will be the new total tickets sold?
A) 8070;
B) 8080;
C) 8090;
D) 8100;

Q5: What is the average tickets sold of the three least-selling events?
A) 1423.33;
B) 1433.33;
C) 1443.33;
D) 1453.33;

Answers and Explanations:
Answer (Q1): B) 5300
Explanation:
Event2 + Event4 = 1700 + 2000 = 3700.
3700 + Event5 (1600) = 5300.

Answer (Q2): C) 25%
Explanation:
Total = 1500+1700+1200+2000+1600 = 8000.
% of Event4 = (2000 ÷ 8000) × 100 = 25%.

Answer (Q3): B) 17:12
Explanation:
Event2:Event3 = 1700:1200.
Divide both by 100 → 17:12.

Answer (Q4): C) 8090
Explanation:
Event3 new = 1200 + 20% of 1200 = 1200 + 240 = 1440.
Event1 new = 1500 − 10% of 1500 = 1500 − 150 = 1350.
New total = 8000 + 240 − 150 = 8090.

Answer (Q5): B) 1433.33
Explanation:
Three least-selling events: 1200, 1500, 1600.
Total = 1200 + 1500 + 1600 = 4300.
Average = 4300 ÷ 3 = 1433.33.