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A random variable X has the following di...

A random variable X has the following distribution
`{:(X=x_(1):,-2,-1,0,1,2,3),(P(X=x_(1)):,0.1,k,0.2,2k,0.3,k):}`
The value of k and its mean and variance are

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The correct Answer is:
0.1, 2.16
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