In January 2025
Answer to Question #216637 in Statistics and Probability for mimi
A store had a scratch-and-win promotion in which 1000 cards indicated 10% off, 50 cards indicated 15% off, 10 cards indicated 20% off and 1 card indicated 40% off. What is the expected value for a given scratch-and-win card? *
"E(X)=\\frac{1}{1061}(1000*10+50*15+10*20+1*40)=\\frac{10990}{1061}\\approx10.36\\%."
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