a. What is the probability that the customer is at least 30 but no older than 49? b. What is the probability that the customer is either older than 60 or younger than 20? c. What is the probability that the customer is at least 60?

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Q: PROBLEM SOLVING: Find the area corresponds to given value of z. 1. Z = 2.74 2. Z = 2.88 3. Z = 3.02

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A: We have given that n = 20 p = 55% = 0.55

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