Math Help - conditional probability

The definition of the conditional probability f(x|y)=f(x,y)/f(y)
but what is now f(x|x>a), because I don't know what f(x,x) is.
And what is E(X|X>a) for a random variable X then

thx

Originally Posted by sung

The definition of the conditional probability f(x|y)=f(x,y)/f(y)
but what is now f(x|x>a), because I don't know what f(x,x) is.
And what is E(X|X>a) for a random variable X then

thx

, when and zero otherwise, and



CB