History Bookmarks Develop Window Help ctmath.com McGraw-Hill Connect Math An IMA

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History Bookmarks Develop Window Help ctmath.com McGraw-Hill Connect Math An IMATH Hosted by ALEKS Corp Chapter 5 Test (Required) Previous 1 2 3 4 5 6 78 9 10 Next Question 7 of 10 (4 points) View problem in a pop-up Approximately 11.5% ofAmerican high school students drop out of school before graduation. Assume the variable is binomial. Choose 20 students entering high school at random. Find these probabilities. Round intermediate calculations and final answers to three decimal places Source: www.infoplease.com Part 1 out of 3 No more than three drop out P(no more than three drop out)

Explanation / Answer

solution:-
given that p = 0.115, n = 20
p(x ? 2) = p(x = 1) + p(x = 2) + p(x = 3)
= 0.0869+0.2258+0.2787+0.2173
= 0.809

by formula = p(X = x) = ncr * pr * qn-r

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