Math Problem Statement
A bag contains 1 gold marbles, 9 silver marbles, and 21 black marbles. Someone offers to play this game: You randomly select one marble from the bag. If it is gold, you win $3. If it is silver, you win $2. If it is black, you lose $1. What is your expected value if you play this game?
Solution
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Math Problem Analysis
Mathematical Concepts
Probability
Expected Value
Formulas
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Theorems
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Suitable Grade Level
Grades 9-12
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