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Mathematics 13 Online
OpenStudy (anonymous):

A survey of coffee drinkers found that given a choice, 5 out of 7 coffee drinkers prefer regular coffee to decaffeinated coffee. What is the probability that of the next five coffee drinkers who enter The Coffee Bean, none of them will want decaf?

OpenStudy (kropot72):

The probability that a coffee drinker will not want decaf is 5/7. \[P(5\ next\ don't\ want\ decaf)=(\frac{5}{7})^{5}=you\ can\ calculate\]

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