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Kim has a strong first serve; whenever it is good (that is, in) she wins the point 73% of the time. Whenever her second serve is good, she wins the point 60% of the time. Seventy percent of her first serves and 70% of her second serves are good.

(a) What is the probability that Kim wins the point when she serves?

(b) If Kim wins a service point, what is the probability that her first serve was good?

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