Agame involves rolling a fair six-sided die. if the number facing upward on the die is a whole number multiple of three, the player wins an amount equal to the number on the die times $20. if the number is not a multiple of three, the player gets nothing. what is the expected value of a player's winnings on each roll?
a. $3.33
b. $6.66
c. $8.50
d. $30.00
e. $40.00