Math CentralQuandaries & Queries


Question from Anisa, a student:

There are 30 students in a class. A quarter of the boys and half of the girls study music, making a total of 11 music students. How many girls are there in the class?


Suppose that the number of boys in the class is b and the number of girls is g. You are told that

b + g = 30.

How many boys study music? How many girls study music? The sum is 11 so this gives you a second equation in b and g. Solve for g and b.

If you have difficulty completing this write back and tell us where you are stuck.


About Math Central


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.
Quandaries & Queries page Home page University of Regina PIMS