Average

SSC CGL · Quantitative Aptitude · 38 practice questions with answers and explanations: 13 Easy, 14 Medium, 11 Hard.

Sample questions

Sample Easy question 1

Find the average of 18, 22, 26, 30 and 34.

  1. 24
  2. 25
  3. 26
  4. 28
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Answer: C. Sum = 130, average = 130/5 = 26.

Sample Medium question 2

The average age of a family of 5 members is 26 years. If a 10-year-old child is not counted, find the average age of the remaining 4 members.

  1. 29
  2. 30
  3. 31
  4. 32
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Answer: B. Total age = 5×26 = 130. Excluding the child: (130-10)/4 = 30.

Sample Hard question 3

Three numbers are in the ratio 2:3:5 and their average is 30. Find the largest number.

  1. 40
  2. 45
  3. 50
  4. 55
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Answer: B. Sum = 30×3 = 90. The ratio parts total 2+3+5=10, so each part = 9. The largest number is 5×9 = 45.

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