Data interpretationQuestion 509 of 550

A student scored 80, 90, 78 and 86 in four tests. What score does he need in the fifth test to have a mean of 85?

  1. 85
  2. 91
  3. 89
  4. 95
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Correct answer: 91

The sum needed is 5 × 85 = 425. The sum of the four scores is 334. He needs 425 - 334 = 91.

Test structure: ETEC guide to the GAT

Practice data interpretation

Questions last reviewed: 21 October 2026