nCr=n!/r!/(n-r)!
Wiki User
∙ 13y agoIf you have N things and want to find the number of combinations of R things at a time then the formula is [(Factorial N)] / [(Factorial R) x (Factorial {N-R})]
You can make 5 combinations of 1 number, 10 combinations of 2 numbers, 10 combinations of 3 numbers, 5 combinations of 4 numbers, and 1 combinations of 5 number. 31 in all.
they are 21C2 combinations
If the combinations don't require numbers to be in specific spots such as 2+3 being different then 3+2, then all the possible combinations with what was listed include: 6+6 2+2+2+6 2+2+2+2+2+2
There are 10,737,573 combinations and you must think I am mad if you think I am going to list them!
His
12p5
a tree diagram
Csicket
It when you show the actual orders.
Whoever asked this question you spelled combinations wrong and combinations are what are used to see how many pairs or groups you can make out of objects.
Four combinations: tam ham mat hat Hope it helps (:!
Ask your teacher or anyone else who knows how to do it!?!
12
If you have N things and want to find the number of combinations of R things at a time then the formula is [(Factorial N)] / [(Factorial R) x (Factorial {N-R})]
Simple arithmetic in adding or subtracting card values, and at a mathematical level, mainly permutations and combinations.
this is really math. but 6