Final answer:
The odds in favor of David winning the raffle are 1/125.
Step-by-step explanation:
The odds in favor of David winning the raffle can be calculated by dividing the number of tickets David has by the total number of tickets sold. In this case, David has 4 tickets out of the 500 tickets sold.
So the odds in favor of David winning are 4/500, which can be simplified to 1/125.