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Math Help - probability ......

  1. #1
    Member
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    probability ......

    Hello,
    plz try to solve this queston.
    Thanks.

    Question:
    A discrete random variable x can assume five possible values: 2, 3, 5, 8 and 10. Its probability distribution is shown here:



    x = 2 , 3 , 5, 8, 10.

    p(x) = 0.15 , 0.10, ---, 0.25, 0.25.


    1. What is p(5) ?
    2. What is the probability that x equals 2 or 10?
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  2. #2
    Member Glaysher's Avatar
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    Quote Originally Posted by m777 View Post
    Hello,
    plz try to solve this queston.
    Thanks.

    Question:
    A discrete random variable x can assume five possible values: 2, 3, 5, 8 and 10. Its probability distribution is shown here:



    x = 2 , 3 , 5, 8, 10.

    p(x) = 0.15 , 0.10, ---, 0.25, 0.25.


    1. What is p(5) ?
    2. What is the probability that x equals 2 or 10?
    1. All the probabilities should add up to 1. You can use this fact to work out the missing one

    2. 0.15 + 0.25 = 0.4
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