SOLUTION: A bin contains 78 light bulbs of which 9 are defective. If 3 light bulbs are randomly selected from the bin with replacement, find the probability that all the bulbs selected are g

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Question 938098: A bin contains 78 light bulbs of which 9 are defective. If 3 light bulbs are randomly selected from the bin with replacement, find the probability that all the bulbs selected are good ones. Round to the nearest thousandth if necessary.
0.002
0.692
0.885
0.721
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
p(def) = 9/78, p(good) = 69/78
...
3 drawn with replacement...
P(all good) = +%2869%2F78%29%2869%2F78%29%2869%2F78%29 = .692