Answer:
36% of people surveyed prefers country music, while 30% of people surveyed prefers rap music.
Explanation:
Find how many people were surveyed.
10 + 18 + 7 + 15 = 50
Take the amount of people who likes rap music and divide by the number of people surveyed.
15/50 = .3 = 30%
Take the amount of people who likes country music and divide by the number of people surveyed.
18/30 = .36 = 36%