A pet store sells mice in 2 colors: brown and white. If 3/5 of the mice are brown, the ratio of male mice to female mice is 2:1, and 1/2 of the female mice are white, then what is the ratio of the number of brown male mice to the number of white male mice?

Answer 1

1/3 of the mice are female, so
1/6 of the mice are white female
1/6 of the mice are brown female

3/5 are brown, so 3/5-1/6 = 13/30 are white male

1-(1/3+13/30) = 7/30 are brown male

So, brownmale/whitemale = 7/13