3 years ago

Similar right triangles plss helpp

Mathematics

2 answers:

jeka57 [31]3 years ago

5 0

Answer:

your añswer is c) I hope it helps!

Serggg [28]3 years ago

4 0

Answer:

Step-by-step explanation:

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The standard deviation of a normal random variable x is $20. given that p(x ≤ $10) = 0.1841. from this we can determine that the

attashe74 [19]

Let $\mu$ be the mean of $X$ . Then

$\mathbb P(X\le10)=0.1841\iff\mathbb P\left(\underbrace{\dfrac{X-\mu}{20}}_Z\le\dfrac{10-\mu}{20}\right)=0.1841$

For a random variable $Z$ following the standard normal distribution, we have

$\mathbb P(Z\le z)=0.1841\implies z\approx-0.8999$

Transform the random variable to get this critical value in terms of $\mu$ :

$\dfrac{10-\mu}{20}=-0.8999\implies\mu\approx27.997$

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