When a fair coin is tossed once, there are 2 possible outcomes:
- Head
- Tail
The probability formula is:
P(E)=frac{text{Favourable Outcomes}}{text{Total Outcomes}}
Here,
- Favourable outcome for getting a head = 1
- Total outcomes = 2
So,
P(text{Head})=frac{1}{2}
Therefore, the probability of getting a head when tossing a coin once is 1/2 or 0.5 or 50%.

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