The average of 5 numbers is 13. If the average of 4 of these numbers is 10, the fifth number is ____?
- 5
- 15
- 25
- 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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