Adance club has 51 members and 30 of them are college students. also, 22 of the club members are female and 10 of these females are college students. there are members of the club who are male and are not college students. how many are they?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.