ArithmeticQuestion 361 of 550

The mean of six numbers is 15. The number 21 is removed. What is the mean of the remaining five numbers?

  1. 13.8
  2. 14
  3. 15
  4. 18
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Correct answer: 13.8

Sum = 6 × 15 = 90. After removal: 90 − 21 = 69. Mean = 69 ÷ 5 = 13.8.

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Questions last reviewed: 21 October 2026