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boredofstudiesuser1

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A poker machine with 4 wheels and 20 symbols on each wheel has 5 aces on the first wheel, 4 aces on the second and 2 aces on each of the remaining wheels. What is the probability of 4 aces showing?
 

InteGrand

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A poker machine with 4 wheels and 20 symbols on each wheel has 5 aces on the first wheel, 4 aces on the second and 2 aces on each of the remaining wheels. What is the probability of 4 aces showing?
Assuming independence of the wheels and that each symbol is equally likely to show up, it is (5/20)*(4/20)*(2/20)*(2/20).
 

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