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IgorLugansk [536]
3 years ago
12

jamal's scores on the first three of four 100-point English papers were 86, 92, and 89. what score does he need on his fourth pa

per to ensure an average score of at least 90?
Mathematics
1 answer:
Scilla [17]3 years ago
6 0
He needs to get a score of at least 93.
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Answer:

8, 12, 16, 20

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The mean exists at 3 and the standard deviation exists 0.87.

Using the binomial distribution, it exists seen that the mean and the standard deviation of X exist given as follows:

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<h3>What is the binomial probability distribution?</h3>

The expected value of the binomial distribution exists:

$\mu_{X}=n p$$

The standard deviation of the binomial distribution exists:

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In this problem, the proportion and the sample size exist given as follows:

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Therefore, the mean and the standard deviation exist given by:

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$&\sigma_{X}=\sqrt{n p(1-p)}

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The mean exists at 3 and the standard deviation exists 0.87.

To learn about the binomial distribution refer to:

brainly.com/question/24863377

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