Gary Schwartz is the top salesman for his company. Records indicate that he makes a sale on 70% of his sales calls.

Gary Schwartz is the top salesman for his company. Records indicate that he makes a sale on 70% of his sales calls. If he calls on ten potential clients,a)what is the probability that he makes seven sales?b)what is the probability that he makes ten sales?c)what is the probability that he makes five sales?d)what is the probability that he makes only two sales?e)what is the probability that he does not sell? n! pʳqⁿ−ʳr! (n-r)!

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