Two-way tables

Sample Two-way tables questions

A few of the 51 questions, from easier to harder. Choose your exam board and tier to practise them, with every answer marked.

1. Question 12 marksGrade 4-5
   The two-way table shows information about 40 commuters.

   	own a pet	do not own a pet	Total
   Bus	6	12	18
   Car	9	13	22
   Total	15	25	40

   One of these commuters is chosen at random. Given that the commuter chosen is in the "Car" row, work out the probability that they also own a pet. Give your answer as a fraction in its simplest form.
   Show the worked solution

What are the common mistakes in Two-way tables?

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.

• Uses the grand total as the denominator when a subgroup total was needed

  Used the grand total (28) as the denominator instead of the column total for "passed" (13).

• Reads the value from the wrong column of a table

  Read the values from the "do not like sport" column instead of the "like sport" column that the question specifies as the given condition.

• Uses the row total as the denominator instead of the column total, or vice versa

  Used the row total for "Boys" (11) as the denominator instead of the column total for "passed" (16). The condition given here is a COLUMN, so the denominator must be that column's total, not a row total.

Quick answers about Two-way tables

How many Two-way tables practice questions are there?

There are 51 self-marking GCSE Maths questions on Two-way tables, written for AQA, Pearson, OCR across Foundation and Higher tier. Each one is marked instantly and has a full worked solution.

Do I need an account to practise Two-way tables?

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