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- Quantitative Aptitude
4.Average
easy
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