Assume that when adults with smartphones are randomly selected, 46% use them in meetings or classes. if 6 adult smartphone users are randomly selected, find the probability that at least 3 of them use their smartphones in meetings or classes.

The probability is 0.1253.

This is binomial because 1) there are two outcomes (either do or do not use in class); 2) the events are independent of each other (the probability of one person using a phone in class does not affect the probability of another person doing this); and 3) there is a fixed number of trials (9).

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