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20 August, 00:08

Assume that when adults with smartphones are randomly selected, 52 % use them in meetings or classes. if 15 adult smartphone users are randomly selected, find the probability that exactly 9 of them use their smartphones in meetings or classes.

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  1. 20 August, 01:08
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    The first sentence is just there to throw you off, so you divide 9 into 15 to find the probability of 9 people using their smartphones in a meeting of 15 people, this gives you a 60% chance.
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