Find a formula for p(x) = P(X=x) ....

by sbarb25
Tags: formula
sbarb25 is offline
Oct20-09, 12:05 AM
P: 2
So I have a test tomorrow and this question is in a list of review questions and I'm having trouble remembering where the mu fits into the formula. Any help would be greatly appreciated :)

Question: Suppose that X is a random variable with just two possible values a and b. For x = a and b find a formula for p(x) = P(X = x) in terms of a, b and mu = E(X).
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Office_Shredder is offline
Oct20-09, 01:02 AM
P: 4,499
If P(X=a)=p and P(X=b)=1-p, what can you say about E(X)?

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