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castortr0y [4]
2 years ago
5

How does (1) - (-9) = 10

Mathematics
1 answer:
jonny [76]2 years ago
8 0
Hi (1)-(-9) = 10 Yes it's equal two because we know that -×- = +. So now you have 1+9 = 10 Got it ? If you have any further question please let me know.
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The population of weights of a particular fruit is normally distributed, with a mean of 464 grams and a standard deviation of 6
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Answer:

If 27 fruits are picked at random, then 2% of the time, their mean weight will be greater than 466.37 grams

Step-by-step explanation:

Mean = \mu = 464

Standard deviation =\sigma = 6

We are supposed to find If 27 fruits are picked at random, then 2% of the time, their mean weight will be greater than how many grams i.e.P(X>x)=0.02

The mean weight is in the highest 2%, you want to go to a z-table and find the z-score that where the area to the left of the curve is closest to 0.98.

n = 27

Refer the z -table

P(Z>x)=2.06

\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}=2.06\\\frac{x-464}{\frac{6}{\sqrt{27}}}=2.06\\x-464=2.06 \times \frac{6}{\sqrt{27}}\\x=(2.06 \times \frac{6}{\sqrt{27}})+464\\x=466.37

So, If 27 fruits are picked at random, then 2% of the time, their mean weight will be greater than 466.37 grams

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