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3 years ago

13

The population mean score for a particular exam is 74 and the standard deviation is 9. What are the mean and standard deviation

of the class average score for classes composed of 36 students randomly drawn from the population?

1 answer:

Vaselesa [24]3 years ago

7 0

Answer:

Step-by-step explanation:

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Two parallel lines are crossed by a transversal. Horizontal and parallel lines b and c are cut by transversal a. At the intersec

pogonyaev

Answer:

$x=22$

Step-by-step explanation:

According to the Alternate Interior angles theorem, the bottom left angle and the upper right angle have the same measure. Because they were formed from a pair of parallel lines crossed by a transversal one.

So, algebraically:

$5x+5=115\\ 5x+5-5=115-5\\ 5x=110\\ \frac{5x}{5}=\frac{115}{5}\\x=22$

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3 years ago

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A number is decreased by 40% to 525. what is the original amount?

zhenek [66]

Answer:

875

Step-by-step explanation:

lets assume the original amount X

the new amount = X - ( X × 40% )

525 = (60 × X) ÷ 100

X = ( 525 × 100 ) ÷ 60

<u>X = 875</u>

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2 years ago

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Solve. <br> 24= 7/8g<br> A. 3/7<br> B. 21<br> C. 23 1/8<br> D. 27 3/7

Mrac [35]

I hope this helps you

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2 years ago

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What is the total value of 245 $1 bills

Fantom [35]

What do you mean... $245???

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3 years ago

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A right angled triangle has a second angle equal 24 degrees. The side adjacent to this angle is 3,7 metres long. How long are th

Vaselesa [24]

Hypotenuse will be 4.05
Opposite will be 1.65

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2 years ago