Question: Assume that the pond contains 100 fish: 81 green, 18 purple, and 1 silver. A contestant pays $0.60 to randomly catch one fish and receives $0.40 if the fish is green, $0.90 if the fish is purple, and $10.00 if the fish is silver.
How much (on average) does the carnival gain on each play? (If the carnival loses money, enter a negative dollar amount)