Do I need an account to practise Probability scale?

No. You can start practising Probability scale straight away without an account. A free account keeps your results across sessions, so you can see your progress on this topic over time.

Probability scale and basic principles

Probability scale

34 self-marking GCSE and IGCSE practice questions on Probability scale, written specifically for AQA, Pearson, OCR, Pearson International GCSE Maths A (4MA1), Cambridge IGCSE Mathematics (0580), Cambridge IGCSE (9-1) Mathematics (0980) across Foundation and Higher and Core and Extended tier. Instant marking with full worked solutions on every question.

Start practising Probability scale (no account needed)

Sample Probability scale questions

A few of the 34 questions, from easier to harder. Choose your exam board and tier to practise them, with every answer marked.

Question 11 markGrade 2-3
Taylor says: "On Monday, 150% of the students were absent from my school." Could this be true? Explain how you decide.
Show the worked solution
100% represents ALL of the students. Since nobody can be "more than all" of the group, a percentage of a whole group can never exceed 100%. Taylor's statement cannot be true.
Question 22 marksGrade 2-3
A fair spinner has 8 equal sections, numbered 1 to 8. Write down the probability of landing on a number greater than 5, as a fraction in its simplest form.
Show the worked solution
Numbers greater than 5: 6, 7, 8 - that's 3 favourable outcomes
Total number of possible outcomes = 8 M1
Probability = $\frac{3}{8}$

What are the common mistakes in Probability scale?

When a pupil makes one of these on Revision Workshop, the marking engine names the mistake and explains it, instead of just marking the answer wrong.

Compares probabilities by their numerators only, ignoring differing denominators
Compared numerators without considering the different denominators; must convert to decimals (or a common denominator) first
Gives the complement of the required probability instead of the probability itself
Used the probability of the opposite event ( $\frac{1}{3}$ simplified to $1/3$ ) instead

Quick answers about Probability scale

How many Probability scale practice questions are there?: There are 34 self-marking GCSE and IGCSE Maths questions on Probability scale, written for AQA, Pearson, OCR, Pearson International GCSE Maths A (4MA1), Cambridge IGCSE Mathematics (0580), Cambridge IGCSE (9-1) Mathematics (0980) across Foundation and Higher and Core and Extended tier. Each one is marked instantly and has a full worked solution.
Do I need an account to practise Probability scale?: No. You can start practising Probability scale straight away without an account. A free account keeps your results across sessions, so you can see your progress on this topic over time.