Aboard game is played as follows: a number cube numbered 1 to 6 is rolled. if the number 1 comes up, you get nothing.
if the number 2.3. or 5 comes up. you win 40 points. if the number 4 or 6 comes up. you lose 60 points. use the
expected value to prove whether or not the game is fair. show all work for full credit.