Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and the Yahoo Answers website is now in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

Trending News

Promoted
?
Lv 4
? asked in Science & MathematicsMathematics · 7 years ago

How to solve Combination equations?

3(nC6)=n+1C6

Solve for N

Thanks!

1 Answer

Relevance
  • M3
    Lv 7
    7 years ago
    Favorite Answer

    3n(n-1)(n-2)....(n-5)/6! = (n+1)(n)(n-1)....(n-4)/6!

    cancelling out common terms,

    3(n-5) = (n+1), which yields

    n = 8

    -------

Still have questions? Get your answers by asking now.