Answer:
Explanation:
X the number of correct answers the dog chooses by guessing
Then each guess is independent of the other. Also there are only two outcomes either correct or not correct.
Since dog does not know the answer and there is simple guessing the dog selecting the correct answer = dog correcting noncorrect answer = 1/2
X is binomial (n =10 and p = 1/2)
Expected values of correct answers
=E(X)
=Mean of a binomial variable
=np
Here n =10 and p =1/2
Hence expected value of correct answers = 5