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Probability Mass Function help!?
What value of k is needed in order to make f(x;k) = kx^2 x= 1, 3, 5 a probability mass function?
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- 1 decade agoFavorite Answer
to be a probability mass function for f(x) the sum of all probabilities should equal to 1
f(1) = k
f(3) = 9k
f(5) = 25k
so we should have
f(1) + f(3) + f(5) =1
k+9k+25k=1
35k=1
k=1/35
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