SOLUTION: a salesman has 60% chance of making sale to a customer . i a given hour there 3 customers arrive . what is the probability that he makes a sale.?

Question 970850: a salesman has 60% chance of making sale to a customer . i a given hour there 3 customers arrive . what is the probability that he makes a sale.?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
What's the probability he WON'T make a sale?
That's easier, because he could make 1,2,or 3 sales, and each has its own probability.
Probability he will NOT sell is
0.4*0.4*0.4=0.064
Probability he will sell to at least one is 0.936 (1-0.064).
In statistics problems with multiple choices, sometimes it is easier to figure out what you DON'T want and subtract it from 1.
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