When we use a graphing calculator and use nCr or nPr, are these with or without repetitions?

Question

anonymous · Answer

Without repetitions, nPr is when the order matters and nCr the order does not matter

dtan5457 · Answer

I am aware that with repetitions, for permutations you can do n^r

what about combinations? or do I have to memorize those formulas?

nnesha · Answer

i guess yes

dtan5457 · Answer

lol what i just wrote doesn't make sense

dtan5457 · Answer

final conclusion: memorize formulas

dtan5457 · Answer

calculator=without repetitions

nnesha · Answer

yes it's not too hard :P

dtan5457 · Answer

unless there is some key on the calculator for repetitons?

nnesha · Answer

i don't know never used calc for these type of questions

dtan5457 · Answer

if they end up with something like 40!

dtan5457 · Answer

i think you would need it

dtan5457 · Answer

and one more quick question, which formula is this?

nnesha · Answer

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10 numbers are left you can use calculator for those 10 numbers :P