If two random variables XXX and YYY are independent, what is E[XY]E[XY]E[XY] equal to?
E[X]+E[Y]E[X] + E[Y]E[X]+E[Y]
E[X]−E[Y]E[X] - E[Y]E[X]−E[Y]
E[X]⋅E[Y]E[X] \cdot E[Y]E[X]⋅E[Y]
0