Topic: Number Of Conditions

 

There are 12 check boxes available for selection.  How many conditions are there if you were to test every check box combination?  For example:

 

0 check boxes selected = 1 condition

1 check box selected at any one time = 12

2 check boxes selected at any one time = 66

 

1 and 7 being selected is the same as 7 and 1 so no need to duplicate the entry.

 

Two check box number:

1  2  3  4  5  6  7  8  9  10  11  12

x

x   x

x       x

x           x

 

and so on.....

 

Is there a (simple!) calculation that I can do rather than have to draw out the matrix for what will be thousands of conditions?

 

Thank you!