If the probability that a fluorescent light has a useful life of at least 600 hours is 0.9, find theprobabilities that among 12 such lights(i) exactly 10 will have a useful life of at least 600 hours;(ii) at least 11 will have a useful life of at least 600 hours;(iii) at least 2 will not have a useful life of at least 600 hours.

If the probability that a fluorescent light has a useful life of at least 600 hours is 0.9, find the
probabilities that among 12 such lights
(i) exactly 10 will have a useful life of at least 600 hours;
(ii) at least 11 will have a useful life of at least 600 hours;
(iii) at least 2 will not have a useful life of at least 600 hours.

Matching exercise

Match the items on the right to the items on the left.

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