How do you calculate the odds of getting 5 numbers and a bonus ball?

To calculate the odds of getting 5 numbers and a bonus ball in a lottery, you first determine the total number of possible combinations for selecting the 5 numbers from the main pool and the bonus ball from its separate pool. This is done using combinations, often denoted as "n choose k" (C(n, k)), where n is the total number of numbers available, and k is the number of selections. The odds are then calculated by taking the ratio of the successful outcomes (the specific combination of 5 numbers and the bonus ball) to the total number of possible outcomes. The final odds can be expressed as a fraction or in the format of "1 in X," where X is the total number of combinations.