1. The problem statement, all variables and given/known data A card is drawn at random from an ordinary deck of 52 cards and its face value is noted, and then this card is returned to the deck. This procedure is done 4 times all together. Let [tex]X[/tex] be the total number of aces selected and [tex]Y = \cos(\pi X/2).[/tex] [tex]E[Y] = ?[/tex] 2. Relevant equations 3. The attempt at a solution Twenty attempts, still no right answer. I've come to the conclusion that I just missed the boat with this one.