If a coin is fair, that means that it is equally likely to land on heads or tails. A coin has two possible outcomes. Thus, the probability of heads for a fair coin is 0.5 or 1/2.
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Answer: 1/2 or 0.5
Step-by-step explanation: So there are two sides to a coin heads and tails so the probability of getting heads is 1 out of 2 or 1/2 if you need it as a decimal it could also be 0.5