
Jon S. answered 05/28/20
Patient and Knowledgeable Math and English Tutor
C(9,3) * C(3,1)/C(12,4)
You are picking 3 good bulbs out of 9 and 1 bad bulb out of 3
You are sampling 4 bulbs out of 12.
Matt L.
asked 05/28/20Sorry I’m not sure what kind of math this is I’m confused
A box contains 9 good light bulbs and 3 defective bulbs. Find the probability that a random sample of 4 bulbs contains exactly 1 defective bulb.
Jon S. answered 05/28/20
Patient and Knowledgeable Math and English Tutor
C(9,3) * C(3,1)/C(12,4)
You are picking 3 good bulbs out of 9 and 1 bad bulb out of 3
You are sampling 4 bulbs out of 12.
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