Which wallet has the highest average value per bill?

• A. Wallet 1
• B. Wallet 2
• C. Wallet 3
• D. Wallet 4

Answer: (A)

The value per bill in a wallet is measured by taking the total money in that wallet and dividing it by how many bills are in it. Do that for each wallet, and the one with the largest result has the highest average value per bill. This can happen even if that wallet isn’t the one with the most money overall, because it might hold fewer bills that are worth more each.

For example, if the first wallet has four bills totaling $80, its average per bill is $20. If another wallet has twelve bills totaling $120, its average per bill is $10. Even though the second wallet has more money, the first wallet’s bills are, on average, worth more, so it wins. In this question, the first wallet ends up with the greatest average value per bill.