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Math Help - for the following random variable

  1. #1
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    for the following random variable

    x
    -100
    -50
    -25
    0
    25
    50
    100
    200
    1000
    P(x)
    0.01
    0.01
    0.01
    0.92
    0.01
    0.01
    0.01
    0.01
    0.01



    a. Find P(X > 50) =


    b. Find P(X < 0) =


    c. Find P(-50 < X < 1000) =


    d. Find P(X = 0) =

    please help me I am stuck I think I know what I am doing but then again I dont
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  2. #2
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    Quote Originally Posted by stewardt View Post
    x
    -100

    -50

    -25

    0

    25

    50

    100

    200

    1000

    P(x)

    0.01

    0.01

    0.01

    0.92

    0.01

    0.01

    0.01

    0.01

    0.01

    a. Find P(X > 50) =

    b. Find P(X < 0) =

    c. Find P(-50 < X < 1000) =

    d. Find P(X = 0) =

    please help me I am stuck I think I know what I am doing but then again I dont
    a. Pr(X > 50) = Pr(X = 100) + Pr(X = 200) + Pr(X = 1000)

    = 0.01 + 0.01 + 0.01 (read directly from the probability table)

    = 0.03.


    The other ones are done in a similar way.
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