A computer salesperson knows from his past experience that he sells computers to one in every twenty customers who enter the sho

A computer salesperson knows from his past experience that he sells computers to one in every twenty customers who enter the showroom. What is the probability that he will sell a computer to exactly two of the next three customers?

(a) 57/20³

(b) 57/20²

(d) 57/20

A computer salesperson knows from his past experience that he sells computers to one in every twenty customers who enter the showroom.

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