Asked by Anonymous
There are 90 students in a classroom. How many relationships are there in this classroom? Show how you got this.
Hint: Consider this 2 students in the class would be 1 relationship, whereas 7 students in the class would yield 21 relationships.
What I think: I'm super stuck on this. I think you use factorials but how?
Hint: Consider this 2 students in the class would be 1 relationship, whereas 7 students in the class would yield 21 relationships.
What I think: I'm super stuck on this. I think you use factorials but how?
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