Children 7393

The average age of the children in the group is 14 years. There are four times more boys than girls in the group. The average age of the girls in the group is 12 years. What is the average age of boys?

Correct answer:

a =  14.5

Step-by-step explanation:

(4a+12)/(4+1) = 14

(4·a+12)/(4+1) = 14

0.8a = 11.6

a = 11.6/0.8 = 14.5

a = 29/2 = 14.5

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