Show transcribed image text 15.1.53 You roll a die, winning nothing if the number of spots is odd, $4 for a 2 or a 4, and $16 for a 6 a) Find the expected value and standard deviation of your prospective winnings. b) You play twice. Find the mean and standard deviation of your total winnings c) You play 70 times. What is the probability that you win at least $310? a) What is the expected value? E(X)= (Round to two decimal places as needed.)

15.1.53 You roll a die, winning nothing if the number of spots is odd, $4 for a 2 or a 4, and $16 for a 6 a) Find the expected value and standard deviation of your prospective winnings. b) You play twice. Find the mean and standard deviation of your total winnings c) You play 70 times. What is the probability that you win at least $310? a) What is the expected value? E(X)= (Round to two decimal places as needed.)