Question:
A coin is tossed once. Find the probability of getting a tail.
Solution:
We know that
Probability of occurrence of an event
$=\frac{\text { Total no. of Desired outcomes }}{\text { Total no.of outcomes }}$
Total outcomes of the coin are tails and heads
Hence the total no.of outcomes are 2 (i.e. heads and tails)
And the desired output is tail. Hence no. of desired outcomes $=1$
Therefore, the probability of getting a tail is
$=\frac{1}{2}$
Conclusion: Probability of getting a tail when a coin is flipped is $0.5$ or $\frac{1}{2}$