five years ago the average of the ages of a and b was 40 years and now the ave

Question

five years ago the average of the ages of a and b was 40 years and now the average of the ages of b and c is 48 years. what will be the age of the b ten years hence?

Options:

A . 55 years

B . 56 years

C . 58 years

D . Data inadequate

Answer: Option D
Explanation :

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