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December 14th, 2009, 11:21 PM   #1
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Probability (probability mass function,pmf)

If X has the probability mass function f(x) = k / x! (x=0,1,2,...),
what is the value of k?
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December 15th, 2009, 01:18 PM   #2
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Re: Probability (probability mass function,pmf)

Quote:
Originally Posted by naspek
If X has the probability mass function f(x) = k / x! (x=0,1,2,...),
what is the value of k?
?f(x) = ke. Therefore k = 1/e
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