## 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