SOLUTION: You play a game where you are to guess under which of 4 cups a coin has been placed. How many times would you expect to guess correctly in 20 plays of the game? Note that the coi

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Question 430324: You play a game where you are to guess under which of 4 cups a coin has been placed. How many times would you expect to guess correctly in 20 plays of the game? Note that the coin is moved after each play.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
You play a game where you are to guess under which of 4 cups a coin has been placed. How many times would you expect to guess correctly in 20 plays of the game? Note that the coin is moved after each play.
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Binomial Problem with n = 20 and p = 1/4.
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E(x) = np
E(x) = 20(1/4)
E(x) = 5
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Cheers,
Stan H.
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