Probability Games Online Free
Count outcomes for dice and coins, and find the chance of picking a colour from a bag or landing on a spinner.
Type answers on your keyboard, or tap the number pad.
Practise these again:
How do you work out a probability?
Probability is the number of ways something can happen over the total number of equally likely outcomes. A bag with 3 red and 5 blue marbles has 8 marbles, so the probability of red is 3/8.
With two dice there are 6 × 6 = 36 outcomes. A total of 7 can be made 6 ways (1+6, 2+5, 3+4, 4+3, 5+2, 6+1), more than any other total.
How to play Probability
- Choose the 60-second challenge or untimed practice, then press Start.
- Type each answer on your keyboard or tap the number pad. It’s checked as soon as you’ve typed enough digits, or press ✓.
- Get one wrong and you’ll see the right answer, and the question comes back a little later.
- At the end, check your score and the facts to practise again.
Probability skills
- Probability as a fraction
- Counting outcomes for dice and coins
- Probability of an event not happening
Level: Grades 5–7 (ages 10–13)
Tips for probability
Count the total first: that’s the bottom number of the fraction.
P(not red) = 1 − P(red), so count the parts that aren’t red.
For two dice, list the pairs: 3 + 4 and 4 + 3 count as different ways.
Probability questions and answers
How do I enter a fraction?
Each question shows the fraction with one number missing, like P(red) = 3/□. Type just the missing number.
What grade learns probability?
Simple chance language starts around grade 4. Probability as a fraction and counting outcomes are grade 7 topics in the US Common Core.