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kati45 [8]
3 years ago
12

Jordan takes 50% of the cherries from a bowl. Then Mei takes 50% of the remaining cherries. Finally Greg takes 50% of the remain

ing cherries. There are 3 cherries left. How many cherries were in the Bowl before Jordan arrived?
Mathematics
1 answer:
Lynna [10]3 years ago
8 0
If 3 is 50%

3 x 2 = 6

If 6 is another 50%

6 x 2 = 12

If 12 is another 50%

12 x 2 =24

Therefore there were 24 cherries in the bowl!

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Answer:

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Step-by-step explanation:

sin 40° = cos 50°

Hope it helps you in your learning process.

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Simplify the numerator and the denominator separately, then find the quotient
rosijanka [135]
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3 years ago
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For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 50
Volgvan

Answer:

P(\bar X>530)=1-0.808=0.192

Step-by-step explanation:

1) Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Let X the random variable that represent the scores, and for this case we know the distribution for X is given by:

X \sim N(\mu=505,\sigma=170)  

And let \bar X represent the sample mean, the distribution for the sample mean is given by:

\bar X \sim N(\mu,\frac{\sigma}{\sqrt{n}})

On this case  \bar X \sim N(505,\frac{170}{\sqrt{35}})

2) Calculate the probability

We want this probability:

P(\bar X>530)=1-P(\bar X

The best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}

If we apply this formula to our probability we got this:

P(\bar X >530)=1-P(Z

P(\bar X>530)=1-0.808=0.192

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Answer:

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