To determine how many students in the school like hip-hop music best based on the survey, we first need to find the percentage of students in Marty's class who prefer hip-hop music.
In the survey, 14 out of 25 students prefer hip-hop music. To find the proportion, we perform the following calculation:
\[ \text{Proportion of hip-hop likers} = \frac{14}{25} = 0.56 \]
Next, we will apply this proportion to the total number of students in the school, which is 300. We calculate the expected number of students who prefer hip-hop music as follows:
\[ \text{Number of hip-hop likers in school} = 0.56 \times 300 \]
Calculating this gives:
\[ 0.56 \times 300 = 168 \]
Therefore, based on the survey, we can conclude that the estimated number of students in the school who like hip-hop music best is:
C. 168 students