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Understanding Ratios and Probability: A Comprehensive Guide

This page explains the concept of probability, the likelihood of an event occurring randomly expressed from 0 to 1 or 0% to 100%. Learn how to calculate probabilities using systematic lists, area models, and tree diagrams.

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Understanding Ratios and Probability: A Comprehensive Guide

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  1. Ratio and Probability Page 60

  2. Ratio

  3. Ratio Example

  4. Probability • Measure of the likelihood that the event will occur at random • Expressed using numbers that range from 0 to 1 or 0% to 100% • An event that • has no chance of happening has a probability of 0 or 0% • is certain to happen has a probability of 1 or 100% • might happen range from 0 to 1 and 0% to 100%

  5. Probability (cont’d)

  6. Probability Models Page 219

  7. Systematic List When all possible outcomes of an event has the same probability, probabilities can be calculated by listing all possible outcomes

  8. But when some outcomes are more probable than others…

  9. Area Model

  10. Tree Diagram

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