Question

each group of students receives a bag that has 4 red cubes, 9 green cubes and 7 blue cubes if if each group makes 200 pulls and replaces the cube after each pull, how many times would you expect them to draw a green cube?

Answer 1

There are 20 cubes total. Green cubes make up 9/20 of the cubes. So if you make 20 pulls with replacement you would expect to get 9 green cubes. Therefore, you would expect to pull a green cube 90 times after pulling 200 cubes.