Question 3 of 8. Step 1 of 1
1 answer:
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Answer:
So then the best answer for this case would be:
C. 2.78
Step-by-step explanation:
For this case we have the following probabability distribution function given:
Score P(X)
A= 4.0 0.2
B= 3.0 0.5
C= 2.0 0.2
D= 1.0 0.08
F= 0.0 0.02
______________
Total 1.00
The expected value of a random variable X is the n-th moment about zero of a probability density function f(x) if X is continuous, or the weighted average for a discrete probability distribution, if X is discrete.
If we use the definition of expected value given by:
And if we replace the values that we have we got:
So then the best answer for this case would be:
C. 2.78
800,000 or eight hundred thousand.
<h3>Further explanation</h3><u>Problem:</u> The given number is 826,140.
<u>Question:</u> What is the value of the digit 8?
<u>The Process:</u>
This is a problem with place value.
Let us set the place values from 826,140 consecutively as follows.
- In the thousands period: 8 hundred thousands, 2 ten thousands, 6 one thousands.
- In the units period: 1 hundreds 4 tens 0 ones.
Let us say in word form: eight hundred twenty-six thousand six hundred forty.
Hence, the value of the 8 in the numbers 826,140 is 800,000 or eight hundred thousand.
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<u>Extra:</u>
What is the value of the digit 6 in the numbers 826,140? The answer is 6,000 or six thousand.
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<u>Notes:</u>
Recall that the digits in large numbers are in groups of three places, i.e.,
- hundreds,
- tens, and
- ones (or units).
The groups are called periods, i.e.,
- millions period
- thousands period
- ones or units period
Commas are typically used to separate the periods.
<h3>Learn more</h3>- Some similar problems brainly.com/question/106975 and brainly.com/question/547255
- What 3 digits are in the units period of 4,083,817 brainly.com/question/558692
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