A poker hand (5 cards) is dealt off the top of a well-shuffled
deck of 52 cards. Let X be the number of diamonds in the hand. Let
Y be the number of hearts in the hand.
1. Do you think Cov[X,Y] is positive, negative, or zero?
Explain.
2. let Di(i=1,...,5) be a random variable that is 1 if the ith
card is a diamond and 0 otherwise. What is E[Di]?
3. let Hi(i=1,...,5) be a random variable that is...