FreeMathWorksheet
FreeMathWorksheet

Classwork Worksheet

TN-MATH-O-LVL-72336 · v3.0

Probability Basics

O Level · Math · Statistics · Common Core

Grade

O Level

Subject

Math

Topic

Statistics

Subtopic

Probability Basics

Curriculum

Common Core

Difficulty

Core

Time

20 minutes

Total marks

44

Student name

Teacher name

Date

Learning objectives

  • Recognise probability basics accurately in math contexts.
  • Explain the underlying rule of probability basics in the student's own words.
  • Apply probability basics to multi-step and unfamiliar problems.
  • Justify a chosen method and identify errors in another student's work.

Skills assessed

  • Fluency and recall
  • Method and setting out
  • Reasoning and justification
  • Problem solving in context
  • Self-assessment

Instructions

  1. Write your name, your teacher's name and the date in the header.
  2. Answer every question in the space provided. Continue on the back if needed.
  3. Show all working — method marks are awarded even when the final answer is wrong.
  4. Aim to finish in about 20 minutes.
  5. Complete the reflection box at the end before you hand the sheet in.

Warm-up

Bloom: Remember · 3 marks

Answer quickly. These check you are ready for the topic.

  1. 1.Circle one fact you already know about probability basics.

    [1]
  2. 2.State one fact you already know about probability basics.

    [1]
  3. 3.Write down one fact you already know about probability basics.

    [1]

Recall

Bloom: Remember · 3 marks

Complete from memory. No calculator, no notes.

  1. 1.List the key term used in probability basics described here: item 1.

    [1]
  2. 2.List the key term used in probability basics described here: item 2.

    [1]
  3. 3.Label the key term used in probability basics described here: item 3.

    [1]

FreeMathWorksheet · TN-MATH-O-LVL-72336 · v3.0

© 2026 FreeMathWorksheet. Licensed for classroom and home use. Redistribution or resale is not permitted.

Page 1 of 4

FreeMathWorksheet · O Level Math

Probability Basics

Basic Practice

Bloom: Understand · 4 marks

Work through each item. Show the step you used.

  1. 1.Complete part 1 using the rule for probability basics.

    [1]
  2. 2.Identify part 2 using the rule for probability basics.

    [1]
  3. 3.Work out part 3 using the rule for probability basics.

    [1]
  4. 4.Complete part 4 using the rule for probability basics.

    [1]

Guided Practice

Bloom: Understand · 6 marks

The first step is given. Finish the reasoning.

  1. 1.Complete the method for part 1. Step 1 has been started for you.

    [2]
  2. 2.Using the first step given, finish part 2. Step 1 has been started for you.

    [2]
  3. 3.Continue the working for part 3. Step 1 has been started for you.

    [2]

FreeMathWorksheet · TN-MATH-O-LVL-72336 · v3.0

© 2026 FreeMathWorksheet. Licensed for classroom and home use. Redistribution or resale is not permitted.

Page 2 of 4

FreeMathWorksheet · O Level Math

Probability Basics

Independent Practice

Bloom: Apply · 8 marks

No scaffolding. Set out your full method.

  1. 1.Solve part 1 on probability basics without help.

    [2]
  2. 2.Determine part 2 on probability basics without help.

    [2]
  3. 3.Solve part 3 on probability basics without help.

    [2]
  4. 4.Work out fully part 4 on probability basics without help.

    [2]

Challenge Questions

Bloom: Analyse · 6 marks

Harder items. Attempt every one, even partially.

  1. 1.Prove the statement in part 1 about probability basics.

    [3]
  2. 2.Find and justify the statement in part 2 about probability basics.

    [3]

Real-life Application

Bloom: Apply · 6 marks

Use the skill in context. State units in your answer.

  1. 1.Apply a real math situation that depends on probability basics.

    [3]
  2. 2.In context, work out a real math situation that depends on probability basics.

    [3]

FreeMathWorksheet · TN-MATH-O-LVL-72336 · v3.0

© 2026 FreeMathWorksheet. Licensed for classroom and home use. Redistribution or resale is not permitted.

Page 3 of 4

FreeMathWorksheet · O Level Math

Probability Basics

Critical Thinking

Bloom: Evaluate · 8 marks

Explain your reasoning in full sentences.

  1. 1.Evaluate whether a student's method for probability basics is or is not efficient.

    [4]
  2. 2.Explain why a student's method for probability basics is or is not efficient.

    [4]

Reflection

Bloom: Create · 0 marks

Not marked. Answer honestly — this guides your next worksheet.

  1. 1.Reflect on how confident you feel with probability basics and what you will practise next.

    [—]
  2. 2.Describe how confident you feel with probability basics and what you will practise next.

    [—]

FreeMathWorksheet · TN-MATH-O-LVL-72336 · v3.0

© 2026 FreeMathWorksheet. Licensed for classroom and home use. Redistribution or resale is not permitted.

Page 4 of 4