Mathematics, 23.09.2019 20:00 Suphat

Aiden asked a group of students to choose thier favorite type of music from the choices rock, hip-pop, and country. (rock had 20 students) [hip-pop had 40 students] {and country had 30 students}
how many students in a class of 360 would be expected to choose hip-pop or rock as thier favorite type of music?

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