Permutation and combination Questions with online test

Get 100+ Permutation And Combination Questions in Online MCQ test formulas, Problems, Shortcut tricks, easy solving techniques, for Competitive exams like SSC CGL, SSC GD, SSC MTS, Banking, Railway, UPSC, IAS, etc.

Practice these questions and get good results in permutation and combination section, which is very important, here we listed frequently asked questions and some previous year questions that could be helpful for you.

Formulas for Permutation and Combination

$^{n}P_{r} = n!/{(n-r)!}$
$^{n}P_{n} = n!$
$^{n}P_{1} = n$
$^{n}C_{r} = n!/{(r! (n-r)!)}$
$^{n}C_{1} = n$
$^{n}C_{0} = 1 = ^{n}C_{n} $
$^{n}C_{r} = ^{n}C_{n-r} $
$^{n}C_{r} = {^{n}P_{r}} /{r!}$