A computer technician notes that 45% of computers fail because of the hard drive, 15% because of the monitor, 22% because of a disk drive and 18% because of the microprocessor. If the problem is not because of the disk drive, what is the probability that it is in the hard drive?

Suppose you just purchased a digital music player and have put 8 tracks on it. after listening to them you decide that you like 4 of the songs. with the random feature on your player, each of the 8 songs is played once in random order. find the probability that among the first two songs played (a) you like both of them. would this be unusual? (b) you like neither of them. (c) you like exactly one of them. (d) redo () if a song can be replayed before all 8 songs are played.