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WITCHER [35]
2 years ago
8

Find the product of 2.1n(6n + 3.4).

Mathematics
2 answers:
RSB [31]2 years ago
8 0
12.6n2+7.14n is the right option have a good day :)
V125BC [204]2 years ago
8 0
I think the last one is right. 12.6n2+7.14n
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Answer:

The mean of C is 170 households

The standard deviation of C, is approximately 5 households

Step-by-step explanation:

The given parameters are;

The percentage of households in the United States that had a computer in 2014 = 85%

The size of the randomly selected sample in 2014, n = 200

The random variable representing the number of households that had a computer = C

Therefore, we have;

The probability of a household having a computer P = 85/100 = 0.85

Let

Therefore;

The mean (expected) number in the sample, μₓ, = E(x) = n × P is given as follows;

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The mean of C = μₓ = 170

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