Question 971709: When Joe bowls, he can get a strike 60% of the time. What is the probability Joe will get at least 2 strikes out of 5 tries?
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! There are 5C2 10 ways he can get 2 strikes.
The probability he gets 2 strikes
0.6*0.6*0.2*0.2*0.2
That is just if he gets the first two.
He can get ANY two, so that is where the 10 come from
1-3, 1-4, 1-5
2-3,2-4,2-5
3-4,3,5,4-5 are the other 9
The 5 term product is 0.02304. Multiply it by 10, and the probability is 0.2304
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