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.
The probability of guessing correctly is 1/4. The expected numberE(X) of correct guesses in 20 plays is given by: E(X) = 20 * (1/4) = 5. The answer is: 5 times.
