6.3.2

Theoretical Probability

Test yourself

Theoretical Probabilities

We can work out the theoretical probabilities involved in an experiment without having to do the experiment itself.

Illustrative background for FormulaIllustrative background for Formula ?? "content

Formula

  • This is true assuming all outcomes are equally likely.
Illustrative background for ExampleIllustrative background for Example ?? "content

Example

  • P(rolling even number on fair die) = 3 ÷ 6 = 12
    • There are 3 even numbers it could be (2,4,6) and there are 6 possible outcomes overall (1,2,3,4,5,6).

Multiple Events

A spinner has 5 possible outcomes, a dice has 6 possible outcomes and picking a card from a deck of cards has 52 possible outcomes. What is the total number of ways to spin the spinner, roll the dice and pick a card?

Jump to other topics

1Numbers

2Equations, Formulae & Identities

3Sequences, Functions & Graphs

4Geometry

5Vectors & Transformation Geometry

6Statistics & Probability

Unlock your full potential with Seneca Premium

  • Unlimited access to 10,000+ open-ended exam questions

  • Mini-mock exams based on your study history

  • Unlock 800+ premium courses & e-books

Get started with Seneca Premium