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quester [9]
3 years ago
8

Assume that each of the n trials is independent and that pis

Mathematics
1 answer:
sukhopar [10]3 years ago
6 0
P(x)=n!/(n-x)!x!= 15!/12!*3!
P(x)=15*14*13*12!/12!*3*2*1=455
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