Assume that when adults with smartphones are randomly selected, 51% use them in meetings or classes. If 9 adult smartphone users are randomly selected, find the probability that at least 7 of them use their smartphones in meetings or classes.
The probability is ?.
(Round to four decimal places as needed.)
We have given,
The probability that at least 7 of them use their smartphones in meetings or classes
=P[X=7]+P[X=8]+P[X=9]
=0.0776+0.0202+0.0023
=0.1001
X | P(X) |
7 | 0.0776 |
8 | 0.0202 |
9 | 0.0023 |
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