FIND THE PROBABILITY OF CHOOSING A BLUE MARBLE THEN RED MARBLE IF THE MARBLES ARE NOT REPLACED there are 4 white 3 blue and 5 red marbles
Mathematics · Middle School · Sun Jan 24 2021
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Formula :
Probability = Favorable outcome/Total outcome
Number of white marbles = 4
Number of red marbles = 5
Number of blue marbles = 3
Total marbles = 4 + 5 + 3
= 12
So, probability of getting blue marble = 3/12
= 1/4
Now, Total marble = 12 - 1
= 11
Probability of getting red marble = 5/11
So, Total Probability = 1/ 4 × 5/11
= 5/44
Hence, probability of getting blue marble then red marble is 5/44