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Intro to Probability

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.
Understanding Probability
The Nature of Probability
Randomness and Predictability