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World 4 · Probability & Distributions · 7 min · PRO

Expected value

The long-run average

PRO · Calculus & Probability

World 4: Probability & Distributions is part of PRO

The first world of Calculus & Probability is free. PRO opens the other 48 lessons in 6 worlds — simulations, quizzes and all.

  • Sample space & events
  • Combining probabilities
  • The two-dice sum
  • Random variables
  • Variance & spread
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