The average of a group of men is increased by 5 years when a person aged of 18 years is replaced by a new person of aged 38 years. How many men are there in the group?

A) 3

B) 4

C) 5

D) 6

Let member be = x 

Increased average = x*5

Given Condition:

x*5=38-18

x= 4

 

 

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