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Damm [24]
3 years ago
15

there are 3 red, 1 blue, amd 2 yellow marbles in a bag. Once a marble is selected, it is not replaced. What is the probability o

f grabbing a red and yellow marble
Mathematics
1 answer:
worty [1.4K]3 years ago
6 0

Answer: the chance you will pull a yellow it 2/6 and the chance you pull a red is 3/6

Step-by-step explanation: add all them up and you get six and then you put the number by six

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pentagon [3]
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2 years ago
For a certain online store, the distribution of number per hour is approximately normal with mean 1200 purchases and standard de
Advocard [28]

Answer: 16%

Step-by-step explanation:

When we have a normal distribution, the 100% of our sample will be placed in a "gaussian bell".

Where the middle of this bell coincides with the mean.

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In the image below you can see that between the points.

Mean + standard deviation and the end of the graph, we have:

13.5% + 2.35% + 0.15% = 16%

And particularly, if we want to know the percentage that exceed 1400, will be the same percentage above the mean plus the standard deviation.

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SD = 200

mean + standard deviation = 1200 + 200 = 1400.

Then the percentage that exceeds 1400 is equal to the percentage that we found above, then the correct option is C: 16%

5 0
3 years ago
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professor190 [17]

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Step-by-step explanation:

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2 years ago
What is the answer to −9 ×(−8)
klio [65]

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Step-by-step explanation:

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