Written HW:

3. If the probability that a certain tennis player will serve an ace is .25, what is the probability that he will serve exactly two aces out of five serves? (Assume that the five serves are independent.)

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4.

(a) make a sketch of the area under the standard normal curve corresponding to the probability, and

(b) find the value of the probability of the standard normal random variable , corresponding to this area.

i.

( > 2.27)

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ii.

(0.45<<1.75)

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