Grade 7 · Year 8 · Class 7 · ages 12–13 · Data
Simple probability: Grade 7 practice
Writing the chance of an event as a fraction. Eight questions at a time, instant feedback and a mastery score from 0 to 100.
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Right answers raise your mastery score (more on harder questions) and wrong ones lower it a little. Your best score is saved on this device, and in your account if you log in.
The idea in one minute
Probability = the number of ways it can happen ÷ the number of equally likely outcomes. It is always between 0 and 1.
Try these on paper first
One question at each level. Tap a question to see the answer.
Easy A bag has 5 red and 9 blue balls. The probability of picking a red ball is
Answer: 514
Medium A fair die is rolled. The probability of getting a number less than 2 is
Answer: 16
Challenge A bag has 4 red, 5 blue and 2 green balls. The probability of NOT picking red is
Answer: 711
More ways to practise simple probability
- Printable simple probability worksheet with an answer key (new questions every time)
- Probability Basics: an interactive lesson on the idea behind it
- All Grade 7 practice · Mean, median and mode worksheets
Related skills
- Mean word problems (Grade 6)
- Mean, median and mode (Grade 5)
- Range of a set of numbers (Grade 5)
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FAQ
Simple probability: questions
What grade is simple probability?
It is usually taught in Grade 7 (Year 8 in England, Class 7 in India, ages 12–13), though schools and countries differ. Try the grade above or below if it feels too hard or too easy.
What does a simple probability question look like?
For example: "A fair die is rolled. The probability of getting a number less than 2 is" The answer is 1/6. Probability = the number of ways it can happen ÷ the number of equally likely outcomes. It is always between 0 and 1.
What should I learn before and after simple probability?
Before it, try mean word problems (Grade 6). After it, move on to square roots (Grade 8).
How can I get better at simple probability?
Probability = the number of ways it can happen ÷ the number of equally likely outcomes. It is always between 0 and 1. Practise a little every day, read the hint after each wrong answer, and use the printable worksheet when you want to write it out.
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