Assume that on a standardized test of 100 questions, a person has a probability of 85% of answering any particular question correctly. Find the probability of answering between 80 and 90 questions, inclusive. (Assume independence, and round your answer to four decimal places.) P(80 ≤ X ≤ 90)

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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Chapter7: Percents
Section7.1: Percents And Fractions
Problem 30E
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Assume that on a standardized test of 100 questions, a person has a probability of 85% of answering any particular question correctly. Find the probability of answering between 80 and 90 questions, inclusive. (Assume independence, and round your answer to four decimal places.)
P(80 ≤ X ≤ 90) 
 
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