If u hav 10 choices which r choices1,2,3,4,5,6,7,8,9,10 and u can only pick 4. How many combination coul u hav?

Question

i.e 1,1,1,1 or another 1,5,3,1. They can repeat as many times. How many different combinations can I have? And what are they? Or is there a method to find all combinations?
(trying to figure out all possible password for the xbox 360)

Sorry for the misspelling but my question wouldn't fit.

Answer 1

If the numbers can be repeated, then you would have 10 * 10 * 10 * 10 or 10^4.

Answer 2

This is a combinations problem (i.e., order of the digits in the groups of four are not important). The formula for calculating combinations is: C = N! / r! (N - r)!

N = the number of items available (i.e., 10)

r = the number of items in each group (i.e., 4)

N! means N factorial (i.e., 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1)



So the problem is: C = 10! / 4! (10 - 4 )!

= 3,628,800 / 24 (720)

= 3,628,800 / 17,280

= 210

Answer 3

I hope your question is this:



"How four things can be picked up from {1,2,3,4,5,6,7,8,9,10} if repetitions are allowed."



If so, Evey time you have choices for picking any one from the given 10 things.



Hence it is = 10 x 10 x 10 x 10 = 10000

Answer 4

10*10*10*10=10000

Answer 5

i'm guessing yu would do 10x4x4 but if you could only use each # once then it would be 40 buti guess it's 160

Answer 6

OVER 9000!!!!