Average age of 6 persons is decreased by 1 yr, when one new person is included in the group. Find the age of new man, if average age of 6 persons was 42 yr?
Explanation
Given, Average age of 6 persons is 42
The average age of 6 persons is decreased by 1 yr (A= 42-1, N= 6)
= 6×41= 246
when new person included in the group (A=41, N= 6+1)
= 7×41= 287
The age of new man= 287-246
= 41
Hence, Option E is correct.
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