This activity is based off of Derby Race Horse odds which are calculated based on the number of people choosing to bet on a specific horse. It is not about the number of horses racing, it is about who people think will win! A horse with 30-1 odds means that out of 30 people, 1 person will choose that horse as their winner. Students will turn these odds into more standard ratios such as fractions like 1/30. They will use the multiplication counting principle to calculate the probability of specific horses winning in a given order, using three simple events to calculate their compounded probability.

This activity is a fun chance for students to try their hand at a real life experience! Going to the derby! Students get to choose their horses, convert their odds, and calculate probability. This is an engaging activity for learners of all levels and is completely adaptable to your students needs!