SOLUTION: a box of parts contains 8 good items and 4 defective items. if 2 are selected at random with replacement, find the probability that both are defective.

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Question 865949: a box of parts contains 8 good items and 4 defective items. if 2 are selected at random with replacement, find the probability that both are defective.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

p(def) = 4/8 = .5

2 are selected at random with replacement

P(both def) = .5%2A.5+=+.25 0r 25% chance both are defective