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OLga [1]
3 years ago
9

One coin is taken at random from a bag containing 5 nickels, 3 dimes, and 6 quarters. Let X be the value of the coin selected. F

ind E(X). (Round your answer to two decimal places.) E(X)
Mathematics
1 answer:
Fynjy0 [20]3 years ago
7 0

Answer:

14.64 cents

Step-by-step explanation:

5(5/14) + 10(3/14) + 25(6/14)

= 205/14

Approx. 14.64 cents

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The line plot shows the weights of ten eggs laid by one hen. What is the total weight in ounces of the four heaviest eggs?
Likurg_2 [28]
The four heaviest eggs are 2 ounces, 2 ounces, 2 1/4 ounce is, and 2 1/2 ounces. Add these together to total 8 3/4 ounces.

The four heaviest eggs have a sum of 8 3/4 ounces.
8 0
4 years ago
15. A playground sandbox is 3.5 meters wide,
kumpel [21]

Answer:

The answer is 2.625

Step-by-step explanation:

3.5×2.5=8.75

8.75×0.3=2.625

4 0
3 years ago
Adequate Preparation for Retirement. In 2018, RAND Corporation researchers found that 71% of all individuals ages 66 to 69 are a
Svetllana [295]

Answer:

A - Hopes this helps.

Step-by-step explanation:

4 0
3 years ago
Find the mean, Find the median,<br> mode, and range <br> of each Data set 46, 35, 23, 37, 29, 53, 43
g100num [7]

Answer: mean- 38

median- 37

mode- no mode

range- 30

Step-by-step explanation:

5 0
3 years ago
Mark can remember only the first 4 digits of his friend's phone number. He also knows that the number has 7 digits and that the
denis-greek [22]

Answer:

<em>19800 seconds, or 330 minutes, or 5 hours + 30 minutes</em>

Step-by-step explanation:

<u>Number Permutations</u>

We know the phone number has 7 digits, 4 of which are known by Mark. This leaves him 3 digits to guess with. We also know the last one is not zero. The number can be represented as

XXY

Where X can be any digit from 0 to 9 and Y can be any digit from 1 to 9. The first two can be combined in 10x10 ways, and the last one can be of 9 ways, this gives us 10x10x9 = 900 possible permutations.

If each possible number takes him 22 seconds, every possibility will need

22x900=19800 seconds, or 330 minutes, or 5 hours + 30 minutes

3 0
3 years ago
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