Question

Half of the students in Max's class volunteer at the local community center. Fifteen students do not volunteer. If there are 12 boys in Max's class,how many girls are in his class?

Answer 1

Answer: X=18

Step-by-step explanation:

let the numbers of girls be X

total in class = X + 12

number of students who do not volunteer

= (x + 12)/2

but this is 15

(x+12)/2 = 15

x+12 = 30

x = 18

So there are 18 girls in the class.

I hope this helped :)  

Answer 2

18
because 15 * 2 = 30; 30 - 12=18