The average of 5 numbers is 18, if one number is removed, then average – InterviewSolution

1.

The average of 5 numbers is 18, if one number is removed, then average becomes 16. Find the removed number.

Answer»

Sum of 5 numbers = 18 × 5 = 90

Let removed number is x

Then, sum of four number = 16 × 4 = 64

⇒ Sum of four number + x = 90

⇒ 64 + x = 90

x = 90 – 64 = 26

Thus, fifth number = removed number = 26

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