In a popular casino​ game, you can bet one whether a ball will fall in an arc on a wheel colored​ red, black, or green. Say the probability of a red outcome is 18/38
​, that of a black outcome is 18/38
​, and that of a green outcome is 2/38
. Suppose someone makes a ​$ bet on . Find the expected net winnings for this single bet. Interpret the result.