Question

in a class,there are 20 boys whose average age is decreased by 2 months, when one boy aged 18 years is replaced by a new boy.Find the age of the new boy?​

Answer 1

Answer:

Total age reduced because of substitution = 20*2 = 40 months= 3 years 4 months

So, age of the new boy = 18 years - 3 years 4 months = 14 years 8 months