Sales and Customer Service
Probability
British Broadcasting Corporation (BBC)

In a shop there are 20 customers 18 of whom will make a purchase If three customers are selected one at a time at random what is the probability that all will make a purchase?

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Wiki User
September 29, 2009 9:10AM

18/20 x 17/19 x 16/18 = 4896/6840, or around 71.6%.


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