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shusha [124]
3 years ago
13

Answer 20 and 21 please

Mathematics
1 answer:
weeeeeb [17]3 years ago
7 0

Answer:

20 is unreal numbers and 21 is no solution

Step-by-step explanation:

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Answer:

The mean number of the students who develop hypertension over a life time is 7.8.

Step-by-step explanation:

For each person, there are only two possible outcomes, either they will develop hypertension, or they will not. The probability of a person developing hypertension is independent of any other person, which means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

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The expected value of the binomial distribution is:

E(X) = np

Suppose that the probability that a person will develop hypertension over a life time is 60%.

This means that p = 0.6

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The mean number of the students who develop hypertension over a life time is 7.8.

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