Among the 25 invoices prepared by a billing department, 10 contain error while the other do not. If we randomly check of three invoices, what are the probabilities that exactly one have error
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Total invoices prepared = 25
Error ones= 10
Non error ones = 25-10 = 15
Probably to get error ones = 10/25= 2/5
Answer is 2/5
Error ones= 10
Non error ones = 25-10 = 15
Probably to get error ones = 10/25= 2/5
Answer is 2/5
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