# Computer chips and probability

Computer company makes computer chips. Chips made with a 27% yield, meaning that 27% of them are good and the rest are defective.

1. If one chip is picked randomly, find the probability that it is not good.

2. If 2 chips are randomly picked, find the probability that they are both good.

3. If 5 chips are picked randomly, what is the expected number of good chips?

4. If 5 chips are randomly picked, find the probability that they are all good. If the 5 picked chips are good chips, would you continue to believe that the yield was 27%?

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#### Solution Preview

1. As one chip is picked randomly, the probability that this chip is good is 27%. Hence, the probability that it is not good is 1-27%=73%.

2. If ...

#### Solution Summary

This solution provides brief, clear answers to four probability questions. The question determines picking probabilities for computer chips, made with a 27% yield, meaning that 27% of them are good and the rest are defective.