<PRE><B>Question 522239</B>
If a salesman makes a sale on 70% of his sales calls. If he calls four potential clients, what is the probability he makes exactly 3 sales? What is the probability he makes exactly 4 sales?
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Binomial Problems with n = 4 and p(sale) = 0.7
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P(x = 3) = 4C3*0.7^3*0.3 = 0.4116 
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P(x = 4) = 4C4*0.7^4 = 0.2401
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Cheers,
Stan H.
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