## Intro to Probability

Summary
The essence of probability in GRE prep is demystified, focusing on its fundamental nature as a ratio, the significance of randomness, and basic strategies for solving probability questions.
• Probability is defined as 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.
• Listing all possible outcomes is an elementary strategy for solving probability problems, though not always feasible for more complex questions.
• Understanding and applying the basic principles of probability is crucial for tackling GRE questions effectively.
Chapters
00:05
Understanding Probability
00:20
The Nature of Probability
03:32
Randomness and Predictability