Question

An unbiased coin is tossed once. What is the probability of getting a head?

Answer 1

When a coin is tossed once, the possible outcomes are head (H) or tail (T), i.e., $2$.
The favourable out come H is $1$.
Therefore, probability of getting a head is
$P\left(H\right)=\frac{\text{Number of outcomes favourable to H}}{\text{Number of all possible outcomes}}=\frac{1}{2}$.