Answer :

To calculate the probability of winning a raffle with 1000 tickets when you have bought 80 tickets, you need to use the following formula:

Probability = (Number of favorable outcomes) / (Total number of outcomes)

1. The total number of outcomes is the total number of tickets available, which is 1000 in this case.
2. The number of favorable outcomes is the number of tickets you bought, which is 80.

Now, plug these values into the formula:

Probability = 80 / 1000

Simplify this by dividing both numbers by 10:

Probability = 8 / 100

Further simplify by dividing both numbers by 4:

Probability = 2 / 25

So, the probability of winning the raffle when you have bought 80 tickets out of 1000 is 2/25. This means you have a 2 out of 25 chance of winning the raffle.