Answer
14 students selected Wednesday as their second choice.
Work Step by Step
In the preference table, we can see that 9 students selected the days in the order T, W, F, M. We can see that 5 students selected the days in the order T, W, M, F. All of these students selected Wednesday as their second choice.
Therefore, the number of students who selected Wednesday as their second choice is 9 + 5, which is 14.