A box contains 4 red disks, 10 blue disks and 2 yellow disks. Someone offers to play a game where you randomly select one disk from the box . Of it is red , you win $2 . If it is blue , you lose $1 . If it is yellow you win $5. What is your expected value if you play this game ?

Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter14: Counting And Probability
Section14.CT: Chapter Test
Problem 15CT
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A box contains 4 red disks, 10 blue disks and 2 yellow disks. Someone offers to play a game where you randomly select one disk from the box . Of it is red , you win $2 . If it is blue , you lose $1 . If it is yellow you win $5. What is your expected value if you play this game ? 

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