SOLUTION: Suppose that X is a discrete random variable with probability mass function P(x)= cx^2 , x=1, 2 , 3 , 4. Find the value of c

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Question 1188595: Suppose that X is a discrete random variable with probability mass function P(x)= cx^2 , x=1, 2 , 3 , 4. Find the value of c
Answer by ikleyn(52775) About Me  (Show Source):
You can put this solution on YOUR website!
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Find  " c " from this equation  P(1) + P2) + P(3) + P(4) = 1,  which is


    c*1^2 + c*2^2 + c*3^2 + c*4^2 = 1,

    c*(1 + 4 + 9 + 16) = 1

    30c = 1

    c   = 1%2F30.     ANSWER

Solved.