Question: The random variable has pdf where u(x) is the unit step. Determine the mean and the variance of the random variable thus defined. fx(x) =

The random variable has pdf
fx(x) = ;5(x – 5) + lu(x – 4) – u(x – 8)]

where u(x) is the unit step. Determine the mean and the variance of the random variable thus defined.

fx(x) = ;5(x 5) + lu(x 4) u(x 8)]

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