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Anton [14]
3 years ago
5

How would you do this as a decimal number ?

Mathematics
1 answer:
Contact [7]3 years ago
5 0

Answer:

-5.875

Step-by-step explanation:

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Andre45 [30]

Answer:

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2 years ago
Suppose a bag contains many marbles, 54% of which are purple. You draw 5 marbles from the bag with replacement.
dolphi86 [110]

Part A

Use the binomial probability distribution formula.

p = 0.54 = probability of getting a purple marble

n = 5 = sample size

x = 2 = number of purple we want to get

P(x) = \frac{n!}{x!(n-x)!}*p^x*(1-p)^{n-x}\\\\P(2) = \frac{5!}{2!(5-2)!}*0.54^2*(1-0.54)^{5-2}\\\\P(2) = 10*0.54^2*0.46^3\\\\P(2) = 0.283831776\\\\

The \frac{n!}{x!(n-x)!} portion is from the nCr combination formula. The exclamation marks indicate a factorial.

Alternatively, you could use Pascal's Triangle for that portion.

<h3>Answer: 0.283831776</h3>

This decimal value is exact. Round it however you need to.

============================================================

Part B

To find the expected value, aka the mean, we multiply the sample size and probability of getting a purple marble on any single selection.

n*p = 5*0.54 = 2.7

<h3>Answer: 2.7</h3>
6 0
1 year ago
Evaluate each expression please
Firlakuza [10]
13. Is 18 15. Is 86 17 is 5 19 is 15 21 is 24 23 is 29
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3 years ago
2132 plus what equals 2650
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518 is the answer. **
6 0
3 years ago
Read 2 more answers
Fill in the space to complete to equality:<br><br> 3v-v²=v(__)
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Answer:

3v-v² = v(3-v)

Step-by-step explanation:

Use distributive property on the right side of the equality.

6 0
3 years ago
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