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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?
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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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