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Let X be a discrete random variable whos...

Let X be a discrete random variable whose probability distribution is defined as follows:
`P(X=x)={(k(x+1), fo r(x=1,2,3,4)),(2kx, fo r (x=5,6,7)),(0, otherwise):}`
where k is constant, Calculate Standard deviation of X

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PRADEEP PUBLICATION-PROBABILITY-EXERCISE
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