There are 12C4 4 NUMBER combinations. And that equals 12*11*10*9/(4/3/2/1) = 495 combinations. However, some of these, although 4 number combinations consist of 7 digits eg 1, 10, 11, and 12. Are you really sure you want 4-DIGIT combinations?
The number of combinations of N things taken P at a time is (N! - P!) / (N - P)! The number of combinations of 24 things taken 12 at a time is 1,295,295,050,649,599.
1 and 11 and 21 and 31 and 42 and 12 and 22 and 32 and 43 and 13 and 23 and 33 and 44 and 14 and 24 and 34 and 416 combinations
12 how come
The number of selections of 3 cards that can be made from 12 different cards (it does not matter if they are face cards or not) is the number of combinations of 12 things taken three at a time. In this case it is (12! - 9!) / 3! which is 220.
There are 24C12 = 24!/[12!*12!] = 2,704,156 combinations.
There are 12C4 4 NUMBER combinations. And that equals 12*11*10*9/(4/3/2/1) = 495 combinations. However, some of these, although 4 number combinations consist of 7 digits eg 1, 10, 11, and 12. Are you really sure you want 4-DIGIT combinations?
about 12
12 Combinations.
There are 24C12 = 24*23*...*13/(12*11*...*1) = 2,704,156 combinations.
You would get 4!/2! = 12 combinations.
do you mean how many combinations of any size? So we have 12 combinations of size 1 12C2=12x11/2 =66 of size 2 12C3 of size 3 and we keep going and need to add these. But there is a formula for adding all these. Think of the each number between 1 and 12, say 1, for any combination it is either in that combination of not in it. So we have 2^12 combinations. That is 4096
The number of combinations of N things taken P at a time is (N! - P!) / (N - P)! The number of combinations of 24 things taken 12 at a time is 1,295,295,050,649,599.
Only three: 12, 13 and 23. Remember that the combinations 12 and 21 are the same.
1 and 11 and 21 and 31 and 42 and 12 and 22 and 32 and 43 and 13 and 23 and 33 and 44 and 14 and 24 and 34 and 416 combinations
30
6 or 12