For independent continuous XXX and YYY, the conditional PDF fX∣Y(x∣y)f_{X|Y}(x|y)fX∣Y(x∣y) equals what?
fX(x)⋅fY(y)f_X(x) \cdot f_Y(y)fX(x)⋅fY(y)
fX(x)fY(y)fY(y)\frac{f_X(x) f_Y(y)}{f_Y(y)}fY(y)fX(x)fY(y)
fX(x)f_X(x)fX(x)
fY(y)f_Y(y)fY(y)