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