document.write( "Question 609927: a basketball player makes 70% of the free throws he shoots. if he tries 13 throws what is the probability that he will make more than five throws? \n" ); document.write( "
Algebra.Com's Answer #384037 by htmentor(1343)\"\" \"About 
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This problem involves binomial probabilities
\n" ); document.write( "The binomial probability distribution is written as
\n" ); document.write( "P(x) = C(n,x)*p^x*(1-p)^(n-x) where n = the number of trials, x = the number of successes, and p is the probability of success
\n" ); document.write( "More than 5 throws means we need to compute the probability of 6 or more
\n" ); document.write( "P(6 or more) = 1 - P(5 or less)
\n" ); document.write( "P(5 or less) = P(5) + P(4) + ... P(0)
\n" ); document.write( "P(5) = C(13,5)*0.7^5*0.3^8 = 0.0142
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\n" ); document.write( "Adding up all the probabilities and subtracting from 1, we get:
\n" ); document.write( "P(6 or more) = 1 - 0.018 = 0.982
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