The given probability is 1/5.
We know that the odd is the ratio of the favorable outcomes to non-favorable outcomes.
Let P=1/5 be the probability of the event occurring
Then 1-P is the probability of the event not occurring
![1-P=1-(1)/(5)=(5)/(5)-(1)/(5)=(5-1)/(5)=(4)/(5)](https://img.qammunity.org/2023/formulas/mathematics/college/kmcvixkm9e6imxzrt7apetinxn2vx8me1o.png)
The probability of the event not occurring is 4/5
The ratio is
![((1)/(5))/((4)/(5))=(1)/(5)*(5)/(4)=(1)/(4)](https://img.qammunity.org/2023/formulas/mathematics/college/z43ykzwcjtzshdqkxxzh8x7ebsnjui1pn0.png)
The odd of the given probability is
![1\colon4](https://img.qammunity.org/2023/formulas/mathematics/college/hokcpqrpkbnpjnvrbhdaeeh66n443bmczw.png)