What is the average of the first six (positive) odd numbers each of which is div

Question

What is the average of the first six (positive) odd numbers each of which is divisible by 7?

Options:

A . 49

B . 47

C . 43

D . 42

Answer: Option D
Answer: (d)Required average= ${7+21+35+49+63+77}/6$= ${7(1+3+5+7+9+11)}/6$= ${7×36}/6$ = 42

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