



 
Hi Timothy, I think part a. should read
I think also that you are to assume that the probability of making a sale on a call is independent of whether you made sales on the previous calls. In this case you are using the Binomial Distribution and I suggest you look at my response to Venni's previous question. Using the notation in this response, for part a. $n = 6, r = 3, \mbox{ and } p = 0.65.$ Penny 



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