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Mathematics, 02.12.2019 22:04

Abag contains 1 gold marbles, 8 sliver marbles, and 30 black marbles. someone offers to play this game: you randomly select one marble from the bag. if it is gold, you win $4. if it is silver, you win $2. if it is black, you lose $1. what is your expected value if you play the game?

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Abag contains 1 gold marbles, 8 sliver marbles, and 30 black marbles. someone offers to play this ga...
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