Question

Assume that when adults with smartphones are randomly selected, 46% use them in meetings or classes. If 8 adult smartphone users are randomly selected, find the probability that exactly 2 of them use their smartphones in meetings or classes

Answer #1

Solution:

We are given:

Let x be the random variable that denotes the number of adult smartphone users that use their smartphones in meetings or classes. Then the random variable x follows the binomial distribution with n = 8 and p = 0.46 Therefore, we have to find:

Now using the binomial distribution probability formula, we have:

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randomly selected, find the probability that exactly 6 of them use
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The
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selected,
43 %
use them in meetings or classes. If
8
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probability that exactly
4
of them use their smartphones in meetings or classes

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