Determine the likelihood of receiving a tail when a coin is tossed once.

We begin by explaining the concept of probability and how events are weighed.

We take the given events and calculate the number of possible outcomes.

We can calculate the probability of coin tossing using the $P\left(E\right)=\frac{\text{ favourable outcome }}{\text{ total number of outcome }}$

Calculating outcomes

Favorable outcomes i.e., getting tail $=1$

Total number of outcomes $[\mathrm{H},\mathrm{T}]=2$

Finding Probability

The formula for probability$=\frac{\text{ favorable outcome }}{\text{ total number of outcome }}$

Required probability $=\frac{1}{2}$

Hence, the required probability is $\frac{1}{2}$