Probability

Many people use probability, the chance that something will occur, on daily basis! It is how most people decide to do things. For example, one would probably not walk on a plank that has a high probability of breaking under your weight! Therefore, it is important to know probability and how to find them. Basically, probability is the number of successful outcomes over the number of total outcomes.However, there are also many scenarios concerning probability and equations that go with them. Here are the equations: 
Mainly, you should know the ones for independent, dependent, complement, and classical probability formulas. Permutations and Combinations are also important when you are finding the amount of ways something can occur.