Question

Three-fifths of the students are girls. One-third of the girls have blond hair. One-half of the boys have brown hair. A:what fraction of all the students are girls with blond hair?

Answer 1

The answer is 1/5 of the students are blond girls, since 1/3 of 3/5 is 1/5. 
Divide 3/5 by 3, which is 1/5. 
Hope this helps!