1. E(X) = 2
2. E(Z) = 11.7
3. E(W) = 0
4. E(X) = 1
5. E(X) = 1.5
6. E(X) = 7
7. a. k = 0.1
b. E(Y) = 5.4
8. E(number of tails) = 1
9. The average return (expected value) on one$1.00 ticket is $0.70
10. The expected gain to the gambler is -$0.33