Question 994679
if 7 mangoes are chosen at random from 10 mangoes of which 3 are rotten, what is the probability that exactly one is not rotten 
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Binomial Problem with n = 7 and p(rotten) = 3/10; p(not rotten) = 7/10
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P(x = 1 not rotten) = 7C1*(7/10)*(3/10)^6 = binompdf(7,7/10,1) = 0.0036
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and the probability that at least one is rotten?
P(1<= x <= 7) = 1 - P(x = 0 rotten) = 1 - (7/10)^7 = 0.9177
 
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Cheers,
Stan H.