In a class, there are $20$ boys whose average age is decreased by $2$ $months,$ when one boy aged $18\, years$ in replaced by a new boy. The age of the new boy is
In a class, there are $20$ boys whose average age is decreased by $2$ $months,$ when one boy aged $18\, years$ in replaced by a new boy. The age of the new boy is
- A
$14$ years and $8$ months
- B
$15$ years
- C
$16$ years and $4$ months
- D
$17$ years and $10$ months
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