Asurvey asked a group of students to choose their favorite type of music from the choices of rock, hip-hop, and country. the results of the survey are shown in the graph.

based on the graph, how many more students in a class of 270 students would be expected to choose country than rock?
a) 10
b) 20
c) 30
d) 60

I hope that helps!

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yes

step-by-step explanation:

yes