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Exercise 2

Avg difficulty 2.5

A bag contains 5 red marbles, 8 blue marbles, and 15 green marbles. Someone offers to play this game: You randomly select one marble from the bag. If it is blue, you win $3. If it is red, you win $2. If it is green, you lose $1.

  1. Make a probability model for this game.

  2. What is your expected value if you play this game?

Lee et al., Math in Society, §4.3 Expected Value, Exercise 2

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Adapted from Math in Society © 2018–2024 Portland Community College Math Instructors. Licensed under CC BY-SA 4.0. Source: Math in Society. Imported at revision 68ee43c.