Question

5. The average age of the boys in a class
is 12 years. The average age of the
girls in the class is 11 years. There are
50% more girls than boys in the class.
Which one of the following is the
average age of the class (in years)?​

Answer 1

Answer:

11.4

Step-by-step explanation:

boy :girl = 2:3 (50%=1/2)

A/Q

2*12+3*11=57

average = 57÷5 =11.4