Algebra

There are 12 students in a social studies class. Three students will be selected to present their term projects today. In how many different orders can three students be selected?

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  1. 12! ways

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  2. That's not one of the answer choices.
    A. 1,320
    B. 220
    C. 504
    D. 36

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  3. Answer - A. 1,320

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  4. Nope...
    12 students and you are "choosing" three to do their presentation.
    Order doesn't matter, so you have a combination 12C3
    by definition of combination you have
    12C3= n!/(r!(n-3)!
    = 12! divided by 3!(9!)
    = 12 x 11x10 /3x2x1
    = ...

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  5. Sorry - I missed the "three"

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  6. Ash

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  7. So is it a,b,c, or ,d?

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  8. its A. 1,320
    i just took the test

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