The Won-Ton is running a promotion. All customers get a free Won-Ton scratch off ticket. Scratch it, and you will find a coupon good for your next visit. The values of the coupon vary. There is a 50% chance that your coupon will be worth $10, a 40% chance that it will be worth $25, an 8% chance it will be worth $50 and a 2% chance it will be worth $100.
What is the expected value of your coupon?
A. $20
B. $21
C. $22
D. $46.25