Conditional Probability and Independence
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 5 red and 5 blue marbles. A red marble is drawn first (not replaced). Find the probability the second marble drawn is also red.
📘 Worked solution
✓4/9.
And one from the hard end
"60% of employees are engineers, 40% non-engineers. 70% of engineers have a master's; 30% of non-engineers do. Find the overall probability a random employee has a master's."
Solution shown after you try it in practice mode.
Work through all 30, easiest to hardest
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