Post a New Question

Math: Permutations and Combinations

posted by .

Need a verification:
Combinations of n items taken r at a time: C9n,r)= n!/(n-r)!*r!
8!/(8-0)!*(0)! = 8!/8!*0! = 0 or Answer is 0 or 1?

  • Math: Permutations and Combinations -

    The formula is correct, noting the parentheses, i.e.
    C(n,r) = n!/((n-r)!r!)
    Since 0!=1, the expression
    8!/((8-0)!*(0)!) = 1

Answer This Question

First Name:
School Subject:

Related Questions

More Related Questions

Post a New Question