Q393
The average age of 20 boys in a class is 12 years. 5 new boys are admitted to the class whose average age is 7 years. The average age of all the boys in the class becomes:
A.
8.2 years
B.
9.5 years
C.
12.5 years
D.
11 years
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
According to the question,Average
=
=
=
= 11 years