OK, so I am wondering about something and am not good with probability, but maybe someone here has the answer

You have a die with only 4 sides, with the numbers 1-4 written on the sides. You roll the die 5 times. What is the probability of the number 2 showing up:

Once?
Twice?
Three times?
Four times?
All five times?

Note that the sum of the above probabilities is 781/1024 (≈ 0.763), which is the probability of throwing at least one 2 in five throws. If we apply the same formula to determine what the probability is of getting zero 2’s in five throws, we obtain: