Question

Each group of students receives a bag that has 8 red cubes, 2 green cubes, and 10 blue cubes. If each group makes 100 pulls and replaces the cube after each pull, how many times would you expect them to draw a green cube?

Answer 1

10 green cubes

Explanation:

The total number of cubes is 8+2+10 = 20

The probability of drawing a green cube when there is replacement is

P(green) = green cubes/ total

=2/ 20

= 1/10

Multiply the probability by the number of draws to get the total number of cubes

1/10 * 100 draws = 10 green cubes