Question: Making handcrafted pottery generally takes two major steps: wheel throwing and fi ring. The time of wheel throwing and the time of firing are normally

Making handcrafted pottery generally takes two major steps: wheel throwing and fi ring. The time of wheel throwing and the time of firing are normally distributed random variables with means of 40 minutes and 60 minutes and standard deviations of 2 minutes and 3 minutes, respectively.

(a) What is the probability that a piece of pottery will be finished within 95 minutes?

(b) What is the probability that it will take longer than 110 minutes?

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