The random variables X and Y are jointly continuous, with a joint PDF of the form

fX,Y(x,y)=
{cxy if 0≤x≤y≤1
0 otherwise}
where c is a normalizing constant.

a) Is it true that fX|Y(2|0.5) is equal to zero?
b) Is it true that fX|Y(0.5|2) is equal to zero?

1 answer

a) yes
b) no