Expected Value
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
State the formula for expected value of a discrete random variable.
📘 Worked solution
✓E(X)=Σ[x×P(x)].
And one from the hard end
"Option A: 60% chance of $10000 profit, 40% chance of $2000 loss. Option B: 30% chance of $25000 profit, 70% chance of $1000 loss. Which has the higher expected value?"
Solution shown after you try it in practice mode.
Work through all 30, easiest to hardest
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