Combos and perms

formulas for each – 10 seconds hint: order matters for permutations

I use the calculator Combination is the beginning part of bernulli formula

nice strange mee too!

Yep. Just remember combos needed for bernulli and remember both are on your calc!

mcf Wrote: ------------------------------------------------------- > Yep. Just remember combos needed for bernulli and > remember both are on your calc! ?? HP12c???

daj224 Wrote: ------------------------------------------------------- > mcf Wrote: > -------------------------------------------------- > ----- > > Yep. Just remember combos needed for bernulli > and > > remember both are on your calc! > > > ?? HP12c??? oh yeah, i see the N! now. cool – can someone show me how to do 5 apples picked from 15 objects on the HP12c??? combo or permutation, whatever thanks

nPr = n! / (n-r)! so if you have a way of doing factorial on any calc, you should be able to do this one. nCr = n! / [(n-r)! * r!] again same thing. if you have a way of doing factorial on any calc, you should be able to do this one. CP

3,003 combos 360,360 permutations

mcf Wrote: ------------------------------------------------------- > 3,003 combos > 360,360 permutations i got different numbers. we are looking for R objects of of N objects, right so for combo – where order does NOT matter, I did: n!/(n-r)! r! = 15!/[ (10!)(5!) = 1.3 blah blah blah / 435,456,000 = 3,003 combos