SOLUTION: From 4 yellow and 8 blue marbles, 3 are selected. What is the probability that all three are yellow of all tree are blue?
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Question 330553: From 4 yellow and 8 blue marbles, 3 are selected. What is the probability that all three are yellow of all tree are blue? Answer by Fombitz(32388) (Show Source):
You can put this solution on YOUR website! 4 Yellow
8 Blue
12 total
P(1 Y)=4/12=1/3
P(2 Y)=3/11
P(3 Y)=2/10=1/5
P(all 3 Y)=(1/3)(3/11)(1/5)=1/55
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P(1 B)=8/12=2/3
P(2 B)=7/11
P(3 B)=6/10=3/5
P(all 3 B)=(2/3)(7/11)(3/5)=14/55
