According to the given data we have the following:
students surveyed=85
40% of students stated their favorite type of music is country
If 40% of students stated their favorite type of music is country, then 60% of students did not choose country as their favorite type of music.
Therefore, to calculate the amount of students that did not choose country as their favorite type of music we would have to make the following calculation:
amount of students that did not choose country as their favorite type of music=85*60%
amount of students that did not choose country as their favorite type of music=51
The total number of students that did not choose country as their favorite type of music is 51