the average of 5 observation is 15. if three new observation 16.5, 18 and 14.5

Question

the average of 5 observation is 15. if three new observation 16.5, 18 and 14.5 be added. then find the new average.

Options:

A . 15.5

B . 16

C . 16.5

D . 17

Answer: Option A
Explanation :

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