A bag contains 6 blue marbles, 4 red marbles, and 2 yellow marbles. What is the probability of selecting a blue marble, replacing it, then selecting another blue marble?
Mathematics · Middle School · Mon Jan 18 2021
Answered on
Given :
Number of blue marbles = 6
Number of red marbles = 4
Number of yellow marbles = 2
Total marbles = 6 + 4 + 2
= 12
Formula :
Probability = favorable outcome/Total outcome
Probability of getting blue marble = 6/12
= 1/ 2
Now, we replace the blue marble. So, total marbles and N mber of blue marbles remain same.
Probability of getting blue marble = 6/12
= 1/ 2
Total probability = 1/ 2 × 1/ 2
= 1/ 4 or 0.25
Hence, probability of getting 2 blue marbles is 1/4 or 0.25