### Instruction: Mahmoud tosses three coins. What is the probability that he will get at least one head?### Response: I need to find the fraction of possible outcomes that have at least one head.
There are eight possible outcomes for tossing three coins, each with equal probability: HHH, HHT, HTH, HTT, THH, THT, TTH, TTT.
Only one of these outcomes has no heads: TTT.
The rest have at least one head.