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August 31, 2015

Homework Help: Statistics

Posted by Rodney on Thursday, April 19, 2012 at 12:00pm.

12. The proportion of students who own a cell phone on college campuses across the country has increased tremendously over the past few years. It is estimated that approximately 94% of students now own a cell phone. Twenty five students are to be selected at random from a large university. Assume that the proportion of students who own a cell phone at this university is the same as nationwide. Let X = the number of students in the sample of 15 who own a cell phone.

QUESTION: What is the probability that if you choose 40 people exactly 38 will have cell phones?

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