Question: Show all your work. 1) A computer has 15 copies of a software package. Unknown to the store, 3 of the packages have corrupted disks.

Show all your work.

1) A computer has 15 copies of a software package. Unknown to the store, 3 of the packages have corrupted disks. What is the probability that a customer buys 3 packages and one of them are corrupted.

2) The same container with 6 red balls and 4 white balls. This time let the 2 balls be drawn in succession without replacement. Since the balls are drawn without replacement the events are no longer independent. Use Bayes theorem to calculate the probability. If the second ball is red, what is the probability that the first ball was white?

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