Question

17.10. Three men in a cafe order a meal the total cost of which is $15. They each contribute $5. The waiter takes the money to the chef who recognizes the three as friends and asks the waiter to return $5 to the men. The waiter is not only poor at mathematics but dishonest and instead of going to the trouble of splitting the $5 between the three he simply gives them $1 each and pockets the remaining $2 for himself. Now, each of the men effectively paid $4, the total paid is therefore $12. Add the $2 in the waiters pocket and this comes to $14....where has the other $1 gone from the original $15? (5 Points)​

Answer 1

Although the initial bill was $15 dollars, one of the five-dollar notes gets changed into five ones.

The total the three men ultimately paid is $12, as they get three ones back. So from the $12 the

men paid, the owner receives $10 and the waiter receives the $2 difference. $15 - $3 = $10 + $2