Use fractions, decimals, and percents to express the probability of events happening, represent this probability on a probability line, and use it for predictions and informed decisions
30 tutor-authored questions for this Ontario curriculum expectation, ordered easiest to hardest, every one with a full worked solution. Work through all 30 with your weekly-lesson access code.
Sample: the first question, solved
A bag has 3 red and 7 blue marbles. Express the probability of drawing red as a decimal.
📘 Worked solution
✓3 out of 10 is 0.3.
And one from the hard end
A bag has 21 red marbles out of 70 total. Use this probability (as a percent) to predict how many red marbles you'd expect when drawing 500 times with replacement.
Solution shown after you try it in practice mode.
Work through all 30, easiest to hardest
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