The chorus has 35 members. which expression represents the number of ways a group of 6 members can be chosen to do a special performance? a) 35 • 6 b) 35! /6! 29! c) 35! /29!

Can someone me i’m confused. will give brainliest and a whole bunch of points

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.