Question

Q.39) Average age of 12 boys is 30 years, if
average age of the first 7 boys is 40 years and
the average age of the last six boys is 20 years,
find the age of 7th boy.​

Answer 1

Answer:

I think the age of the 7th boy is 25 yrs.

Explanation:

GIVEN:

1ST 7 BOYS - AVERAGE AGE 30 YRS

LAST 6 - AVERAGE AGE 20 YRS

THEREFORE,

THE AGE OS THE 7 TH BOY IS WITHIN 20 TO 30

SO THE AGE IS 25 YRS.

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THANK YOU.