1.

If a random variable X has the probability distrbution given by P(X = 0) = 2 C^(3), P(X= 2) = 5 C - 10C^(2) and P(X= 4) = 4 C - 1, then the variance of that distribution is

Answer»

`68/9`
`22/9`
`612/81`
`128/81`

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