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Mathematics 15 Online
OpenStudy (anonymous):

There are 10 students campaigning to be class representatives. How many different groups of three students could be elected?

OpenStudy (rsadhvika):

pick 3, divide 3!

OpenStudy (rsadhvika):

pick 3 10 . 9 . 8

OpenStudy (rsadhvika):

divide 3! 3 . 2

OpenStudy (rsadhvika):

\(\huge \frac{10 . 9 . 8}{3 . 2}\)

OpenStudy (rsadhvika):

thats right

OpenStudy (anonymous):

I got 120, I think that's right because it's an answer choice

OpenStudy (rsadhvika):

thats right !! very good work :)

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