Question 421359
What is the probability that an Amazon.com visitor will buy eight books, if we are given the following probabilities 
X P(x)
0 0.327 
1 0.206 
2 0.07 
3 0.097
4 0.028
5 0.022
6 0.01
7 0.24

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Add the given probabilities and subtract the sum from 1 to
get the probability of buying 8 books.
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Cheers,
Stan H.