a state offers two lottery games. winone and playball. both games cost $2 per ticket.
• in winone the player picks a single letter from a to j and a single digit from 0 to 9. if both the letter and the digit match the letter and the
digit picked on that day, the player wins $150
• in playball, the player picks a single letter from a to tand a single digit from 0 to 9. if both the letter and the digit match the letter and the
digit picked on that day, the player wins $280.
if the cost of a playball lottery ticket were changed to $1 and the prize to $250, what would the expected value be?
a $0.85
b5025
c. $025
d $0.75