a 12. A business manager who needs to make many phone calls has estimated that when she calls a client, the probability

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A 12 A Business Manager Who Needs To Make Many Phone Calls Has Estimated That When She Calls A Client The Probability 1 (87.38 KiB) Viewed 66 times

a 12. A business manager who needs to make many phone calls has estimated that when she calls a client, the probability that she will reach the client right away is 50%. If she does not reach the client on the first call, the probability that she will reach the client on her second call in the next hour is 20%. And if she does not reach the client on either the first or second call, the probability that she will reach the client on her third call in the hour after that is 10%. The probability that the manager will reach her client in three or fewer calls is How did you derive this value? Let X and Y represent the number of Dell and Lenovo desktop computers, respectively, sold per month at a local computer store. The joint probability distribution of X and Y is presented in the following table: Lenovo Sales 25 30 35 40 45 Total 25 Dell 0.01 0.03 0.02 0.01 0.08 30 0.03 0.02 0.04 0.06 0.01 0.16 0.01 Sales 35 0.04 0.04 0.08 0.08 0.03 0.27 40 0.03 0.05 0.08 0.08 0.03 0.27 45 0.02 0.02 0.04 0.05 0.01 0.14 50 0.01 0.01 0.03 0.02 0.01 0,08 Total 0.14 0.15 0.30 0.31 0.10 1.00 13. The expected number of sales of Dell computers is 14. The standard deviation in the number of sales of Dell computers is 15. If 40 Dell computers are sold in a given month, the expected number of Lenovo computers sold is 16. In any given month than