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Lesson

Classical Probability Formula

When all outcomes in a sample space are equally likely, the probability of an event is given by:

40min lesson

Objectives3 goals Lesson12 blocks Review9 assets Practice32 items

Learning objectives

What to understand

3 goals

Start lesson

Understand classical probability formula in the Probability chapter.
Connect the idea with formulas, examples, and exam-style questions.
Use flashcards, notes, MCQs, and LAQs to check readiness.

Lesson

Step-by-step lesson

12 sections

Concept

Trial and Event

A trial is an action whose outcome is uncertain. An event is a collection of one or more outcomes of a trial. 💡 Exam Tip: Write the sample space first whenever possible, then count favourable outcomes carefully. Use the complement rule when that makes counting easier. ⚠️ Common Mistake: Students often skip the sample space and miscount total outcomes or favourable outcomes. 📌 Trigger: Favourable ÷ total

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12 lesson sections7 cards / 2 notes18 MCQs / 14 written questions

Lesson Notes Flashcards Revision MCQs Written answers Topic test

Notes

Note highlights

2 notes

Review the compact notes before moving into recall.

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1
Classical Probability Formula
2
Equally Likely vs. Unequally Likely Outcomes

Practice

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32 prompts

18 MCQs14 LAQsMixed test

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In this chapter

Probability

Topic 4 of 7

Now on Classical Probability Formula. Next up: Complementary and Equally Likely Events.

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Probability
Sample Space and Events
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Complementary and Equally Likely Events
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Classical Probability Formula

What to understand

Step-by-step lesson

Trial and Event

Trial and Event example

Sample Space

Sample Space example

Favourable Outcomes

Favourable Outcomes example

Probability Formula

Probability Formula example

Drawing a Card from a Deck

Coin Tossing Problem