How many groups of 2 students can be chsen out of 30?

There are 30 students in a class. The teacher will choose 2 students at random to represent the class at an assembly. How many groups of 2 students can be chosen? A) 870 B) 435 C) 60 D) 15
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1 Answer

The answer is D.15
by Level 12 User (101k points)

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