Box contains 15 items, 4 of which are defective and 11 are good. Two items are selected. What is probability that the first is good and the second defective?

Question

Mathematics

Jaylin Bean

8 April, 23:37

Box contains 15 items, 4 of which are defective and 11 are good. Two items are selected. What is probability that the first is good and the second defective?

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Answers (2)

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Giancarlo Vaughan · Answer 1

We have an 11 out of 15 chance, that we can pick a good item, and a 4 out of 15 chance at picking a defect.

By multiplying the two probabilities together, we want to simultaneously pick out two items with order.

Thus, the probability is: 11/15 · 4/15 = 44/225

Camryn Spencer · Answer 2

Defective 1out of 4

effective 1out of 11

i think