A club has 15 men and 25 women. average age of men is 10, years and average age of women is 12 ,year

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A club has $15$ men and $25$ women. The average age of men is $10\, years$ and the average age of women is $12 \,year.$ What is the average age of the whole club in $year$?

A

$11.40$

B

$11.60$

C

$11.25$

D

$12.25$

Solution

Total age of men $=15 \times 10=150$

Total age of women $=25 \times 12=300$

Average age of the whole $club =\frac{150+300}{40}=\frac{450}{40}=11.25 \, years$

Standard 13

Quantitative Aptitude

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