Question: what is the probability of getting zero heads in five tosses?
Answer: Assuming a fair coin in which there are equal probabilies of heads and tails, then the probability of getting 0 tails is… (Probability of heads on 1 flip)^5 = (0.5)^5 = 0.03125. Thus, the probability of getting at least one tail is… 1 - (Probability of 0 tails) = 1- 0.03125 = 0.96875.