Data interpretationQuestion 478 of 550

Number of books borrowed from a library on five days: 12, 18, 15, 20, 10 What is the mean number of books borrowed per day?

  1. 16 books
  2. 14 books
  3. 17 books
  4. 15 books
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Correct answer: 15 books

The sum is 75. There are 5 values. Mean = 75 ÷ 5 = 15.

Test structure: ETEC guide to the GAT

Practice data interpretation

Questions last reviewed: 21 October 2026