Data Interpretation Practice MCQs

Civil Service Exam Professional reviewer with more data interpretation practice: tables on participants by region, electricity use, client satisfaction and an office budget.

1. 1

   Table: Participants in a regional review session — Region I 120, Region II 80, Region III 200, NCR 400. How many participants were there in all?

   A600B700C750D800

   Correct answer: D. 800

   Add all four regions: 120 + 80 + 200 + 400 = 800. Grouping 120 + 80 = 200 and 200 + 400 = 600 makes the total quick. Always total the table before working out shares.

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2. 2

   Table: Participants in a regional review session — Region I 120, Region II 80, Region III 200, NCR 400. What percentage of all participants came from NCR?

   A50%B55%C60%D75%

   Correct answer: A. 50%

   NCR share = 400 ÷ 800 × 100 = 50%. NCR alone had as many participants as the other three regions combined. The other three regions add up to 120 + 80 + 200 = 400, which confirms the 50% share.

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3. 3

   Table: Participants in a regional review session — Region I 120, Region II 80, Region III 200, NCR 400. What is the ratio of Region III participants to Region II participants?

   A5 : 2B2 : 5C5 : 4D3 : 2

   Correct answer: A. 5 : 2

   Region III had 200 and Region II had 80. The ratio 200 : 80 simplifies to 5 : 2 after dividing both by 40. The order follows the question: Region III first.

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4. 4

   Table: Participants in a regional review session — Region I 120, Region II 80, Region III 200, NCR 400. What was the average number of participants per region?

   A150B180C200D220

   Correct answer: C. 200

   Average = 800 ÷ 4 = 200, which happens to equal the Region III figure. NCR is far above the average and Region II far below it.

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5. 5

   Table: Participants in a regional review session — Region I 120, Region II 80, Region III 200, NCR 400. How many more participants came from NCR than from Regions I and II combined?

   A200B220C280D320

   Correct answer: A. 200

   Regions I and II together had 120 + 80 = 200. NCR had 400, so it had 400 − 200 = 200 more. Combine first, then subtract.

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6. 6

   Table: Monthly electricity use of an office, in kWh — January 1,200; February 1,000; March 1,500; April 1,800. By what percentage did use increase from March to April?

   A15%B20%C25%D30%

   Correct answer: B. 20%

   Increase = 1,800 − 1,500 = 300 kWh. Percentage increase = 300 ÷ 1,500 × 100 = 20%, based on the earlier month, March. Dividing by April, the later month, would wrongly give about 16.7%.

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7. 7

   Table: Monthly electricity use of an office, in kWh — January 1,200; February 1,000; March 1,500; April 1,800. What was the total use from January to April?

   A5,000 kWhB5,300 kWhC5,500 kWhD5,800 kWh

   Correct answer: C. 5,500 kWh

   Total = 1,200 + 1,000 + 1,500 + 1,800 = 5,500 kWh. Pair 1,200 + 1,800 = 3,000 and 1,000 + 1,500 = 2,500 for a quick sum.

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8. 8

   Table: Monthly electricity use of an office, in kWh — January 1,200; February 1,000; March 1,500; April 1,800. What was the average monthly use?

   A1,250 kWhB1,300 kWhC1,350 kWhD1,375 kWh

   Correct answer: D. 1,375 kWh

   Average = 5,500 ÷ 4 = 1,375 kWh. Dividing by 4 is the same as halving twice: 5,500 → 2,750 → 1,375. The total of 5,500 kWh comes from adding the four months: 1,200 + 1,000 + 1,500 + 1,800.

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9. 9

   Table: Monthly electricity use of an office, in kWh — January 1,200; February 1,000; March 1,500; April 1,800. In which month was electricity use lowest?

   AJanuaryBFebruaryCMarchDApril

   Correct answer: B. February

   February had the lowest use at 1,000 kWh. Reading the smallest value in a table is quick, but check every row before answering.

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10. 10

    Table: Monthly electricity use of an office, in kWh — January 1,200; February 1,000; March 1,500; April 1,800. By about what percentage did use fall from January to February?

    Aabout 10%Babout 17%Cabout 20%Dabout 25%

    Correct answer: B. about 17%

    Decrease = 200 kWh. Percentage decrease = 200 ÷ 1,200 × 100 ≈ 16.7%, or about 17%. Using February as the base would wrongly give 20%.

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12. 11

    Table: Survey of 250 clients — Very satisfied 100, Satisfied 90, Neutral 35, Dissatisfied 25. What percentage of clients were satisfied or very satisfied?

    A40%B70%C76%D80%

    Correct answer: C. 76%

    Satisfied or very satisfied = 100 + 90 = 190 clients. 190 ÷ 250 × 100 = 76%. Dividing by 250 is the same as multiplying by 0.4: 190 × 0.4 = 76.

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13. 12

    Table: Survey of 250 clients — Very satisfied 100, Satisfied 90, Neutral 35, Dissatisfied 25. What percentage of clients were dissatisfied?

    A5%B10%C15%D25%

    Correct answer: B. 10%

    25 ÷ 250 × 100 = 10%. Careful: 25 is the number of clients, not the percentage. Always divide by the total before calling a number a percentage.

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14. 13

    Table: Survey of 250 clients — Very satisfied 100, Satisfied 90, Neutral 35, Dissatisfied 25. What is the ratio of very satisfied to dissatisfied clients?

    A4 : 1B1 : 4C5 : 1D10 : 1

    Correct answer: A. 4 : 1

    Very satisfied = 100 and dissatisfied = 25. The ratio 100 : 25 simplifies to 4 : 1 after dividing both terms by 25. Keep the order of the terms as the question states it; 1 : 4 would reverse the comparison.

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15. 14

    Table: Survey of 250 clients — Very satisfied 100, Satisfied 90, Neutral 35, Dissatisfied 25. How many clients were NOT dissatisfied?

    A190B200C215D225

    Correct answer: D. 225

    All clients except the 25 who were dissatisfied: 250 − 25 = 225. This includes the very satisfied, satisfied and neutral clients (100 + 90 + 35 = 225).

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16. 15

    Table: Survey of 250 clients — Very satisfied 100, Satisfied 90, Neutral 35, Dissatisfied 25. What percentage of clients were neutral?

    A10%B12%C14%D35%

    Correct answer: C. 14%

    35 ÷ 250 × 100 = 14%. A quick method: each client is 0.4% of the 250 clients, so 35 clients are 35 × 0.4 = 14%. Check: 14% of 250 is 0.14 × 250 = 35, matching the table.

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17. 16

    Table: An office budget of ₱1,500,000 — Salaries 60%, Supplies 15%, Travel 10%, Training 15%. How much is allotted to salaries?

    A₱600,000B₱750,000C₱850,000D₱900,000

    Correct answer: D. ₱900,000

    60% of ₱1,500,000 = ₱900,000. Quick method: 10% is ₱150,000, and 60% is six times that. Check: 0.6 × 1,500,000 = 900,000, the largest item and more than half the budget.

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18. 17

    Table: An office budget of ₱1,500,000 — Salaries 60%, Supplies 15%, Travel 10%, Training 15%. How much is allotted to supplies and training combined?

    A₱450,000B₱500,000C₱525,000D₱600,000

    Correct answer: A. ₱450,000

    Supplies and training together are 15% + 15% = 30% of ₱1,500,000 = ₱450,000. Adding the percentages first saves a step. Check by adding the two items: ₱225,000 + ₱225,000 = ₱450,000.

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19. 18

    Table: An office budget of ₱1,500,000 — Salaries 60%, Supplies 15%, Travel 10%, Training 15%. How much is allotted to travel?

    A₱100,000B₱150,000C₱175,000D₱200,000

    Correct answer: B. ₱150,000

    10% of ₱1,500,000 is ₱150,000: move the decimal point one place to the left. This 10% figure is also a handy building block for the other items.

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20. 19

    Table: An office budget of ₱1,500,000 — Salaries 60%, Supplies 15%, Travel 10%, Training 15%. If the training budget is cut by one-third, what will the new training budget be?

    A₱75,000B₱150,000C₱175,000D₱200,000

    Correct answer: B. ₱150,000

    Training is 15% of ₱1,500,000 = ₱225,000. Cutting it by one-third removes ₱75,000, leaving ₱150,000. Note that ₱75,000 is the amount cut, not the new budget.

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21. 20

    Table: An office budget of ₱1,500,000 — Salaries 60%, Supplies 15%, Travel 10%, Training 15%. The salaries allotment is how many times the travel allotment?

    A3 timesB4 timesC5 timesD6 times

    Correct answer: D. 6 times

    Salaries are 60% and travel is 10%, so salaries are 60 ÷ 10 = 6 times travel. When both items come from the same total, you can compare their percentages directly.

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