279,957 views
41 votes
41 votes
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 blue cube?

User Justin Blank
by
2.7k points

2 Answers

24 votes
24 votes

Answer:

50% of the time

Explanation:

8+2+10=20

20-10=10

10 is half of 20

User MarredCheese
by
2.8k points
13 votes
13 votes

Answer:

50

Explanation:

First find the probability of drawing a blue

The total number of cubes

8 red cubes, 2 green cubes, and 10 blue cubes = 20 cubes

P(blue) = blue / total = 10/20 = 1/2

Since they are replaced, the probability remains the same

100 draws * P(blue) = 100 * 1/2 = 50

User Dore
by
2.9k points