Data Interpretation

JKSSB Junior Engineer (Mechanical) · Mathematics · 100 practice questions with answers and explanations: 38 Easy, 62 Medium, 0 Hard.

Sample questions

Sample Easy question 1

A survey of 500 people found 62% prefer coffee. How many prefer coffee?

  1. 305
  2. 312
  3. 310
  4. 308
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Answer: C. 62% of 500 = 310.

Sample Easy question 2

In a school of 800 students, 55% are boys. How many are girls?

  1. 355
  2. 362
  3. 358
  4. 360
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Answer: D. Boys = 55% of 800 = 440, girls = 800 - 440 = 360.

Sample Easy question 3

In a school of 600 students, 40% are girls. How many are boys?

  1. 355
  2. 360
  3. 358
  4. 362
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Answer: B. Girls = 40% of 600 = 240, boys = 600 - 240 = 360.

Sample Medium question 4

In a bar chart, sales in Q1 were 500 units and in Q2 were 625 units. Find the percentage increase from Q1 to Q2.

  1. 22%
  2. 28%
  3. 20%
  4. 25%
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Answer: D. Increase = 125, percentage = 125/500 × 100 = 25%.

Sample Medium question 5

In a bar chart, sales in Q1 were 800 units and in Q2 were 1000 units. Find the percentage increase from Q1 to Q2.

  1. 22%
  2. 25%
  3. 20%
  4. 28%
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Answer: B. Increase = 200, percentage = 200/800 × 100 = 25%.

Sample Medium question 6

In a school, the ratio of boys to girls is 3:2, and the total is 1000. If 25% of girls play sports, how many girls play sports?

  1. 105
  2. 100
  3. 95
  4. 90
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Answer: B. Girls = 2/5 × 1000 = 400; sports = 25% of 400 = 100.

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