Question

3. 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 yrs. 8 months
(b) 15 years
(c) 16 yrs 4 months
(d) 17 yrs. 10 months​

Answer 1

Answer:

d) 17 yrs. 10 months is the answer