10. If 600 lottery tickets are sold for a cash price of $150, what is the mathematical expectation of a person who buys one of these tickets for $1? 11.Two finalists are in a tennis match with the winner to receive $40,000 and the loser $25,000. What are the two players’ mathematical expectations if they are equally matched? 12.Two finalists are in a tennis match with the winner to receive $40,000
