Theoretical
You conduct an experiment drawing marbles from a bag. In 20 trials, you get a red marble 3 times. What is the experimental probability of getting a red marble?
3/20, 0.15 or 15%
Define a "compound event"
When there are 2 or more events (such as flipping a coin and rolling a number cube)
What is the compound probability of flipping heads on a coin three times in a row?
1/8, 0.125, or 12.5%
Define "fundamental counting principal"
When you multiply the number of items in each category to get the total number of possible outcomes.