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blsea [12.9K]
3 years ago
12

The constant proportionality between the number of markers and the number of pencils in our room is eight over three. There are

304 markers in the art room. How many pencils are in the art room
Mathematics
1 answer:
Maslowich3 years ago
4 0

There are 114 pencils in the art room

<u>Solution:</u>

Given, The constant proportionality between the number of markers and the number of pencils in our room is eight over three.  

\text { number of markers }=\frac{8}{3} \times \text { number of pencils }

There are 304 markers in the art room.  

We have to find how many pencils are in the art room.

Now, from the above formula.

\begin{array}{l}{304 \text { markers }=\frac{8}{3} \times \text { number of pencils in art room }} \\\\ {\text { Number of pencils in art room }=304 \times \frac{3}{8}=38 \times 3=114}\end{array}

Hence, there are 114 pencils in the art room

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Scores on a test are normally distributed with a mean of 81.2 and a standard deviation of 3.6. What is the probability of a rand
Misha Larkins [42]

<u>Answer:</u>

The probability of a randomly selected student scoring in between 77.6 and 88.4 is 0.8185.

<u>Solution:</u>

Given, Scores on a test are normally distributed with a mean of 81.2  

And a standard deviation of 3.6.  

We have to find What is the probability of a randomly selected student scoring between 77.6 and 88.4?

For that we are going to subtract probability of getting more than 88.4 from probability of getting more than 77.6  

Now probability of getting more than 88.4 = 1 - area of z – score of 88.4

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