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Mathematics, 16.10.2019 12:00 india73

Hi! can someone me? ! i'm stuck on this question! if you have the answer, let me know!
a group of students are meeting in the cafeteria. 70 students have already arrived. this is 35% of the group. how many students are in the group?
a) 200
b) 255
c) 500
d) 2450

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