### Sales totals in different weeks

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##### Reference no: EM13988419

The gross weekly sales at a certain used-car lot are normal with mean \$18,800 and standard deviation \$9000.

(a) What is the probability that next week's sales exceed \$20,000?

(b) What is the probability that weekly sales will exceed \$20,000 in each of the next 2 weeks?

(c) What is the probability that the total sales in the next 2 weeks exceed \$40,000?

In parts (b) and (c) assume that the sales totals in different weeks are independent.

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