A game 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 players winnings on each roll.

E = 0 x (4/6) + 60 x (1/6) + 120 x (1/6)  = 30

Step-by-step explanation:

$30

Step-by-step explanation:

Multiples of 3: 3,6

Expected profit:

⅙(3×20) + ⅙(6×20) + 0

10 + 20 + 0

30

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24