Question

109. In a class, there are 20 boys whose aver-
age age is decreased by 2 months, when one
boy aged 18 years is replaced by a new boy.
Then the age of the new boy is:
a) 14 years 8 months
++) {2 years 6 months
c) 15 years 4 months
d) 16 years 2 months​

Answer 1

Answer is (a)

Step-by-step explanation:

Total decrease

= ( 20 X 2 ) months

= 3 years 4 month

∴ Age of the new boy

= ( 18 years ) – ( 3 years 4 months)

= 14 years 8 month