maths !!!?

1. A box contains 4 red and 5 green marbles. If 5 marbles are drawn without replacement, what is the expected number of red marbles?

2.Mark draws one card from a standard deck of 52. He receives $ 0.40 for a diamond, $ 0.60 for a king and $ 0.90 for the king of diamonds. How much should he pay for one draw?

3.A charity holds a raffle in which each ticket is sold for $35. A total of 8200 tickets are sold. They raffle one grand prize which is a Mercedes Benz E350 valued at $45000 along with 2 second prizes of Kawasaki motorcycles valued at $9000 each. What are the expected winnings for a single ticket buyer? Express to at least three decimal place accuracy in dollar form (as opposed to cents).