Question: how rare is it to get pooped on by a bird?
Answer: Suppose there is a 5% chance of being pooped on by a bird during a vacation. That means the probability of being pooped on is 0.05. The probability of being pooped on twice during the vacation is 0.0025 (0.05 x 0.05) or 0.25%, and the probability of being pooped on three times is 0.000125 (0.05. x 0.05 x 0.05).