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If f(X) is the probability distribution ...

If `f(X)` is the probability distribution function of a random variable X and X can assume only two values `x_1` and `x_2`, then the value of `f(x_1)+f(x_2)` is

A

`gt1`

B

`lt1`

C

`=(1)/(2)`

D

`=1`

Text Solution

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The correct Answer is:
D
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Knowledge Check

  • If F(x) is the probability function of a random varible X and X can assume only two values x_(1),x_(2) then the value of F(x_(1))+f(x_(2)) is

    A
    `ge1`
    B
    `le1`
    C
    `ge0`
    D
    1

  • If f(x) = |1-2x| , then the value of f'(2) is -

    A
    1
    B
    `-2`
    C
    2
    D
    none of these

  • If f(x) = x|x| , then the value of f'(-1) is -

    A
    1
    B
    2
    C
    `-1`
    D
    `-2`

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