probability scale

Introduction to Probability – Probability Scale

Master the basics of probability! Learn how to measure the likelihood of events, use the probability scale, and identify certain, likely, unlikely, and impossible outcomes in real-life situations.

Target Age:

Lesson Overview

By the end of this unit, students will:

  1. Understand the concept of probability as a measure of the likelihood of an event occurring.
  2. Use the probability scale to quantify and compare probabilities.
  3. Identify events with certain, likely, unlikely, and impossible outcomes on the probability scale.
  4. Apply the probability scale to real-life scenarios and problem-solving.

Curriculum Alignment: Key Stage 3: Probability

  • Record, describe and analyse the frequency of outcomes of simple probability experiments involving randomness, fairness, equally and unequally likely outcomes, using appropriate language and the 0-1 probability scale
Last updated on: February 21, 2026

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