the average age of a group of persons going for picnic is 16 years. twenty new

Question

the average age of a group of persons going for picnic is 16 years. twenty new persons with an average age of 15 years join the group on the spot due to which their average age becomes 15.5 years. the

Options:

A . 15

B . 20

C . 23

D . 24

Answer: Option B
Explanation :

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