One of the wagers in the game of roulette is to place a bet that the ball will land on a black number. (Eighteen of the numbers
are black, 18 are red, and two are green.) If the ball lands on a black number, the player wins the amount of his bet. If a player bets $7, find the player's expectation.
The answer is A. .3 because do find the percent from a decimal you need to move the decimal point two to the right, so in this case it will be 30 or 30%