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The average of 5 numbers is 13. If the average of 4 of these numbers is 10, the fifth number is ____?
  1. 5
  2. 15
  3. 25
  4. None of these
Explanation

Sum of 5 numbers = 5 × 13 = 65

Sum of 4 numbers = 4 × 10 = 40

Fifth number = 65 - 40

= 25


Last verified on 19-03-2026

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