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OpenStudy (anonymous):
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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OpenStudy (redohawk):
D
OpenStudy (anonymous):
How'd you get that?
OpenStudy (redohawk):
30/2 =15
OpenStudy (anonymous):
Okayy.. Thanks
OpenStudy (redohawk):
but if the same students can be chosen again with a different partner then it would be 60
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OpenStudy (anonymous):
Alright thank you
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