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Math Help - Probability of Sums of Random Variables

  1. #1
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    Probability of Sums of Random Variables

    Any help would be much appreciated!!

    Let X be a random variable with P(x=-1)=P(x=0)= 1/4 and P(x=1)= 1/2.
    Let S be the sum of 25 independent random variables, each with the same distribution as X. Calculate approximately

    a) P(S<0)
    b) P(S=0)
    c)P(S>0)

    Thank you!!
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  2. #2
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    Quote Originally Posted by Amy Armento View Post
    Any help would be much appreciated!!

    Let X be a random variable with P(x=-1)=P(x=0)= 1/4 and P(x=1)= 1/2.
    Let S be the sum of 25 independent random variables, each with the same distribution as X. Calculate approximately

    a) P(S<0)
    b) P(S=0)
    c)P(S>0)

    Thank you!!
    Do you think the Central Limit Theorem can be applied ....?
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