find the expected value of a random variable with the following probability distribution :
2
3
4
5
6
7
8
9
10
11
12
———
1/36
1/18
1/12
1/9
5/36
1/6
5/36
1/9
1/12
1/18
1/36
Answers
Answer:
7
Step-by-step explanation:
correct with acellus
The expected value of a random variable with the following probability distribution will be 7.
How to calculate the expectation of a discrete random variable?Expectation can be taken as a weighted mean, weights being the probability of occurrence of that specific observation.
Thus, if the random variable is X, and its probability mass function is given being f(x) = P(X = x), then we have:
[tex]E(X) = \sum_{i=1}^n( f(x_i) \times x_i)[/tex]
[tex]\rm E(X)=2 \times \frac{1}{36} +3 \times \frac{1}{28} +4 \times \frac{1}{12} +5 \times \frac{1}{9} +6 \times \frac{5}{36} + 7 \times \frac{1}{6} +8 \times \frac{5}{36}+9 \times \frac{1}{9} +10 \times \frac{1}{12} +11 \times \frac{1}{18} +12 \times \frac{1}{36} \\\\ E(X)=7[/tex]
Hence the expected value of a random variable will be 7.
To learn more about the expected value refer to the link:
https://brainly.com/question/4515179
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Answer:
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Answer:
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Step-by-step explanation:
Answer:
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Step-by-step example:
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Answers
Answer:
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Step-by-step explanation:
2/3x-5=1/6x+3
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Answers
Answer:
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Step-by-step explanation:
If you need help with more problems like this you can use m a t h w a y. (remove the spaces) :)
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Answers
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Step-by-step explanation:
Orlando wants to buy a new TV. The price was $985. When he goes to the store a second time, he found that price was marked down by 35%. What is the new price of the TV?
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At janices age she is not only 5 times older than ross, but she is 28 years older than ross. How old is janice?
Answers
Answer:
35 years old
Step-by-step explanation:
Let Janice's age = j.
Let Ross's age = r.
j = 5r
j = r + 28
Set the equations equal to each other.
5r = r + 28
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Answers
Answer:
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Step-by-step explanation:
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Answers
Answer:
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Answer:
y = 5/3x - 5
Step-by-step explanation:
Slope = rise / run
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Answer:
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Answer:
True
Step-by-step explanation:
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Answers
Answer:
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Step-by-step explanation:
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Answer:
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Step-by-step explanation:
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Answers
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Step-by-step explanation:
Answer:
2.7725
Step-by-step explanation:
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Answers
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Step-by-step explanation:
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Answers
Answer:
Step-by-step explanation:
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Step-by-step explanation:
Answer:
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Step-by-step explanation:
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Answers
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Answer:
225
Step-by-step explanation:
length of side in square 3 = 36/4
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= 12
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Answers
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?????????
Step-by-step explanation:
?????????
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Answers
Answer:
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Step-by-step explanation:
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Step-by-step explanation:
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Answer:
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Step-by-step explanation: