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Find the mean of a random variable X, wh...

Find the mean of a random variable X, whose probability density function is `f(x)={{:(lambdae^(-lambdax), "for " x ge 0), (0, "otherwise"):}`.

Text Solution

Verified by Experts

The correct Answer is:
`1/lambda`
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Knowledge Check

  • A discrete random variable X has probability mass function P(x) then

    A
    `0lep(x)le1`
    B
    `p(x)ge1`
    C
    `p(x)le0`
    D
    `(pi)/(2)`

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