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A bin contains 3 different types of flash lights. the probability that a type 1 flash...

A bin contains 3 different types of flash lights. the probability that a type 1 flash light will give over 100 hours of use is 0.7, with the corresponding probabilities for type 2 and type 3 flash light being 0.4 and 0.3 respectively. suppose that 20 percent of the flash lights are of type 1,30 percent are of type 2, and 50 percent are of type 3. wht is the probability that a randomly selected flash light lasts over 100 hours ?

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