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Mathematics, 22.07.2019 18:30 davisnaziyahovz5sk

There are 9 students in a class. the teacher chooses 2 students to go to the
library. the order in which they are chosen does not matter. how many ways
are there to choose the students?

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There are 9 students in a class. the teacher chooses 2 students to go to the
library. the orde...

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