I'm stuck on how to do this problem.
Given $p>0$ when husband and wife independently give correct answers
Let $C$ denote the correct answer and $p > 0$, so let $P(C) = p$ and $P($NOT $\,C) = 1 -p$
The probability to get a correct answer is $1/2$.
The probability of them both having the same answer is $1/4$.
The probability is $1/2$.
The probability is $1/4$.
So $A$ is better??
I think there is something wrong here.