What's on a Grade 12 probability worksheet?

Each pack has up to 12 questions per page with a matching answer key, tuned to Grade 12, with beginner, intermediate, and advanced options so you can match the child's level.

How do you calculate probability?

Divide the number of favourable outcomes by the total number of possible outcomes, then simplify. It can be written as a fraction, a decimal, or a percent.

How do you find the probability of two independent events both happening?

Multiply their individual probabilities: P(A and B) = P(A) × P(B).

Can a probability be more than 1?

No, probability ranges from 0 (impossible) to 1 (certain).

How do you find P(A or B)?

If A and B can't both happen (mutually exclusive), add their probabilities. If they can overlap, add them and then subtract P(A and B) so the overlap isn't counted twice.

What is conditional probability?

The probability of an event given that another event has already happened — e.g. the probability a second card is red, given the first one drawn (and not replaced) was also red.

Grade 12 · Probability

Grade 12 Probability Worksheets

Free printable Grade 12 probability worksheets, each with an answer key and sized to fit one page. Pick beginner, intermediate, or advanced and generate a fresh pack in seconds. No AI, no wrong answers.

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Free to start · answer keys included · your first pack unlocks 14 days of Standard · no card required.

Grade 12 examples by level

BeginnerA bag has 2 red and 3 blue marbles. P(red) =2/5
IntermediateA bag has 5 red and 6 blue marbles. One is drawn and not replaced. Given the first marble drawn is red, P(the second is also red) =40.00%
AdvancedA bag has 11 red, 4 blue, and 11 green marbles. P(red) =11/26

Real problems from the generator: always mathematically correct, and every pack is different.

Why Grade 12 probability practice matters

Probability underlies statistics, games, risk, and decision-making, a key numeracy skill for everyday life.

Grade 12 is the most advanced probability practice Mathter offers, building on what's covered in Grade 8.

Want the full method, tips, and common mistakes? Read the Probability Worksheets guide.

Frequently asked questions

What's on a Grade 12 probability worksheet?: Each pack has up to 12 questions per page with a matching answer key, tuned to Grade 12, with beginner, intermediate, and advanced options so you can match the child's level.
How do you calculate probability?: Divide the number of favourable outcomes by the total number of possible outcomes, then simplify. It can be written as a fraction, a decimal, or a percent.
How do you find the probability of two independent events both happening?: Multiply their individual probabilities: P(A and B) = P(A) × P(B).
Can a probability be more than 1?: No, probability ranges from 0 (impossible) to 1 (certain).
How do you find P(A or B)?: If A and B can't both happen (mutually exclusive), add their probabilities. If they can overlap, add them and then subtract P(A and B) so the overlap isn't counted twice.
What is conditional probability?: The probability of an event given that another event has already happened — e.g. the probability a second card is red, given the first one drawn (and not replaced) was also red.

Make a Grade 12 probability pack

Pick your options and print in seconds, with answer keys included.

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Free to start · answer keys included · your first pack unlocks 14 days of Standard · no card required.