Probability Basics and Rules
10 tutor-authored questions for this Ontario curriculum expectation, ordered easiest to hardest — every one with a full worked solution. Work through them free, no account needed.
Sample: the first question, solved
A bag has 10 marbles, 3 of which are red. Find the probability of drawing a red marble.
📘 Worked solution
✓3/10.
And one from the hard end
Find the probability of rolling a sum of 7 with two dice.
Solution shown after you try it in practice mode.
Work through all 10, easiest to hardest
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