SOLUTION: What probability rule is this and how to I solve it?
From a group of 9 people, you randomly select 4 of them.
What is the probability that they are the 4 oldest people in the
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From a group of 9 people, you randomly select 4 of them.
What is the probability that they are the 4 oldest people in the
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Question 468918: What probability rule is this and how to I solve it?
From a group of 9 people, you randomly select 4 of them.
What is the probability that they are the 4 oldest people in the group?
Give your answer as a fraction. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! From a group of 9 people, you randomly select 4 of them.
What is the probability that they are the 4 oldest people in the group?
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There is only 1 group of the 4 oldest.
There are 9C4 = (9*8*7*6)/(1*2*3*4) = 126 groups
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P(select the 4 oldest) = 1/126
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Cheers,
Stan H.
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