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The probability distribution of a random...

The probability distribution of a random variable x is given as under
`P(X=x)={{:(kx^(2),x="1,2,3"),(2kx,x="4,5,6"),("0,","otherwise"):}`
where, k is a constant. Calculate
(i) E(X) (ii) `E(3X^(2))` (iii) `P(Xge4)`

Text Solution

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The correct Answer is:
(i) 4.32 (ii) 20.64 (iii) 15/22
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