Question

Based on the graph, how many students in a class of 360 students would be expected to choose hip-hop or rock as their favorite type of music? Rock 20% hip-hop 40% and 30% country I know they all total out to be 90 not sure how to get the answer answer choices are 240/80/180 I actually got 180 for the answer but not sure please help

Answer 1

Answer:

240 students

Step-by-step explanation:

20% of the students like rock and 40% like hip-hop. That means that 60% of the 360 students would be expected to choose one of the two. Because you don't know the other 10%, you would assume that they would have the same ratio of students who like country to those who like rock and hip-hop. 60 is 2/3 of 90 so you would expect 2/3 of the students to like hip-hop or rock. 2/3 of 360 is 240. (180 would be 50%, but you were close!)