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A random variable X is defined by X={{...

A random variable X is defined by
`X={{:("3 with probability"=1/3),("4 with probability"=1/4),("12 with probability"=5/(12)"):}`
Then, E(X) is

A

6

B

7

C

5

D

8

Text Solution

Verified by Experts

The correct Answer is:
B
`E(X)=3xx1/3+4xx1/4+12xx5/(12)=7`
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