2 years ago

I know this is stupid but im lazy. What four numbers equal 50.

1 answer:

7 0

12.5 x 4... hope this helped!

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timurjin [86]

Answer:

Step-by-step explanation:

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2 years ago

anygoal [31]

Answer:

1.125 or 9/8

Step-by-step explanation:

5/8 is .625 and 3/6 is .5 so .625+.5=1.125

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3 years ago

charle [14.2K]

The mean is $\mu=85$ and standard deviation is $\sigma=5$ . Then the variable $X\sim N(85,5)$ .

Use substitution $Z=\dfrac{X-\mu}{\sigma}=\dfrac{X-85}{5}$ , then the variable $Z\sim N(0,1)$ .

The probability $Pr(X>80)$ can be calculated in the following way:

for X=80, $Z=\dfrac{80-85}{5} =-1$ and $Pr(X>80)=Pr(Z>-1)$ . From the diagram $Pr(Z>-1)=0.34+0.34+0.135+0.025=0.84$ .

Conclusion: if 188 students take the exam, then 188·0.84=157.92 (157) would receive a score above 80

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3 years ago

serg [7]

The answer is option C

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2 years ago

andreyandreev [35.5K]

In 13! different ways.

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2 years ago