Posted by **Eliza** on Sunday, July 7, 2013 at 10:34am.

A computer repair shop has estimated the probability that a computer sent to the shop has a bad modem is 1/8, the probability that the computer has a bad CPU is 1/5, and the probability that it has a bad drive is 1/3. If we assume that modems, CPUs, and drives are independent, find the probability of the following:

a) A modem, CPU, and a drive in a computer sent to the shop are bad

b) Only a modem and a CPU in a computer sent to the shop are bad

c) None of the three parts (modem, CPU, or drive) is bad

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