Average age of a committee of 8 members is 40 ,years. A member, aged 55, years, retired and he was r

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4.Average

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The average age of a committee of $8$ members is $40 \,years.$ A member, aged $55\, years,$ retired and he was replaced by a member aged $39\, years.$ The average age of the present committee is (in $years$)

A

$39$

B

$38$

C

$36$

D

$35$

Solution

New average of the committee (in $years$)

$=\frac{8 \times 40-55+39}{8}=\frac{320-16}{8}$

$=\frac{304}{8}$

$=38$ years.

Standard 13

Quantitative Aptitude

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