That would be:
20! / 10!
= 20 * 19 * 18 * 17 * 16 * 15 * 14 * 13 * 12 * 11
= 670442572800
* * * * *
No!
That is the number of permutations! The number of combinations is 20C10 = 20!/(10!*10!) = 20*19*18*17*16*15*14*13*12*11/(10*9*8*7*6*5*4*3*2*1)
= 184,756
There are 125970 combinations and I am not stupid enough to try and list them!
Twenty factorial which is denoted by "20!". 20! = 1x2x3x4x5x6x7x8x...x19x20
There are 23C3 = 23!/(20!*3!) = 23*22*21/(3*2*1) = 1,771 combinations.
20
There are many combinations of two numbers that add up to 36. One combination is 20 + 16
There are 167960 combinations.
There are 125970 combinations and I am not stupid enough to try and list them!
There are 167960 9 digits combinations between numbers 1 and 20.
Twenty factorial which is denoted by "20!". 20! = 1x2x3x4x5x6x7x8x...x19x20
There are 45 combinations.
20 and 30, among other possible combinations.
There are 23C3 = 23!/(20!*3!) = 23*22*21/(3*2*1) = 1,771 combinations.
20 and 30, among other possible combinations.
The answer is 20C10 which is 20!/[10!(20-10)!] = 184756
20
7
There are many combinations of two numbers that add up to 36. One combination is 20 + 16