2 years ago

Help with all four please?

Mathematics

1 answer:

dedylja [7]2 years ago

7 0

Answer:

Option c is answer

Step-by-step explanation:

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alukav5142 [94]

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Answer:

$P(X=7)$

And using the probability mass function we got:

$P(X=7)=(15C7)(0.23)^7 (1-0.23)^{15-7}=0.0271$

Step-by-step explanation:

Let X the random variable of interest, on this case we now that:

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Where (nCx) means combinatory and it's given by this formula:

$nCx=\frac{n!}{(n-x)! x!}$

And we want to find the following probability:

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Step-by-step explanation:

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