Common Core · High school
HSS-MD.A.2
High school — Calculate the expected value of a random variable and interpret it as the mean of the probability distribution.
A note on this mapping: This is a (+) standard in the Common Core — intended for students going beyond the college-and-career-ready core — which is why it appears in some courses and not others.
The skill that covers it
What a student should be able to do
- Compute the expected value of a payout table.
- Decide whether a game is fair by comparing its expected value with its stake.
- Predict the long-run total over many repetitions of the same game.
- Find the payout that would make a given game fair.