What will be the probability of getting an odd number if a dice is thrown?

Concept: Probability of getting probability of the occurrence of an event is$P\left(E\right)=\frac{\text{Total number of favorable outcomes}}{\text{Total number of outcomes}}$.

Here, the sample space when a dice is rolled, $S=(1,2,3,4,5,6)$

That is, $n\left(S\right)=6$

$E$ is the event of getting an odd number.

Now, $n\left(E\right)=3$

Thus, $\frac{n\left(E\right)}{n\left(S\right)}=\frac{3}{6}=\frac{1}{2}$

Hence, the probability of getting odd numbers if a dice is thrown is $\frac{1}{2}$.