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- Quantitative Aptitude
4.Average
medium
Average age of $5$ boys is $16$ $year$ of which that of $4$ boys is $16\, year\, 3\, months.$ The age of the $5^{th}$ boy is
A
$15\, year$
B
$15\, year$ $6\, months$
C
$15\, year$ $4\, months$
D
$15\, year$ $2\, months$
Solution
Total age of $5$ boys $=16 \times 5=80$ years
Total age of $4$ boys $=\left(16 \frac{3}{12}\right) \times 4=16.25 \times 4=65$
Standard 13
Quantitative Aptitude