# Question: let x be a quot3 sided diequotthat is to say...

###### Question details

Let
X be a "3 sided die,"that is to say it takes values 1, 2, or 3 with
probability 1/2. After X is determined, a coin is tossed X times.
Let Y be the number of heads. Find the marginal distribution of
each random variable X and Y, and find E(Y).