Help please I dont understand ill mark u

Mathematics

2 answers:

Katyanochek1 [597]3 years ago

8 0

First answer is A and second answer should be 90 lmk if i’m right

iren2701 [21]3 years ago

4 0

Answer:

Part A would be the answer A because it is $7.50 per book which means we will have to multiply

Step-by-step explanation:

Part B, if the camp leader has 12 campers that means she will need to buy books for each (12 x 7.50) which will give you a total of $90

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Part A:

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$P(x\ \textgreater \ 18)=1-P(x\ \textless \ 18) \\ \\ =1-P\left(z\ \textless \ \frac{18-19.32}{2.44}\right) \\ \\ =1-P(z\ \textless \ -0.5410) \\ \\ =1-0.29426=\bold{0.7057}$

Part B:

The probability that an n randomly selected samples of a normally distributed data with a mean, μ and standard deviation, σ is greater than a given value, a is given by:

$P(x\ \textgreater \ a)=1-P(x\ \textless \ a)=1-P\left(z\ \textless \ \frac{a-\mu}{\frac{\sigma}{\sqrt{n}}}\right)$

Given that the average precipitation in Toledo, Ohio for the past 7 months is 19.32 inches with a standard deviation of 2.44 inches, the probability that 5 randomly selected years will have precipitation greater than 18 inches for the first 7 months is given by:

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3 years ago

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