## Intro to Probability

Summary

The essence of probability is explored, emphasizing its definition as a ratio, the significance of randomness, and basic strategies for solving probability problems.

- Probability is fundamentally a ratio or fraction, representing the number of successes over the total number of outcomes, and must fall between 0 and 1.
- A probability of 0 signifies impossibility, while a probability of 1 indicates certainty, with most real-world probabilities lying somewhere in between.
- The concept of randomness in mathematics implies that while individual events are unpredictable, the overall pattern of events is predictable.
- Making a list of all possible outcomes is an elementary strategy for solving simple probability problems, though more complex strategies are necessary for the GRE.
- Understanding and calculating probability involves recognizing patterns and applying mathematical rules to predict the likelihood of events.

Chapters

00:05

Introduction to Probability

00:20

Understanding Probability as a Ratio

03:33

The Concept of Randomness

02:04

Elementary Strategy: Making a List