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3 years ago

The scores on a test given to all juniors in a school district are normally distributed with a mean of 75 and a standard deviati

on of 7.
Find the percent of juniors whose score is no more than 89.

The percent of juniors whose score is 89 or below is ___%

Mathematics

1 answer:

marta [7]3 years ago

3 0

$\mathbb P(X\le89)=\mathbb P\left(\dfrac{X-75}7\le\dfrac{89-75}7\right)=\mathbb P(Z\le2)\approx0.9773=97.73\%$

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<h3><u>Solution:</u></h3>

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<em><u>To find: height of another tree</u></em>

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$\frac{\text {height of tree}}{\text {length of shadow}}$

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Set up a proportion comparing the height of each object to the length of the shadow,

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2 years ago

Read 2 more answers