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8090 [49]
3 years ago
10

Assume that when adults with smartphones are randomly​ selected, 35​% use them in meetings or classes. If 7 adult smartphone use

rs are randomly​ selected, find the probability that exactly 4 of them use their smartphones in meetings or classes.
Mathematics
1 answer:
Lera25 [3.4K]3 years ago
7 0
This can be solved by using the binomial distribution, as follows:
P(4\ users)=7C4\times0.35^{4}\times0.65^{3}=0.144
The answer is: 0.144 to 3 dp.
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