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October 2nd, 2012, 04:34 AM   #1
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all possible combination with returning numbers

Hi all,

I hope this is the correct subforum; if not, please move to the correct one.

I'm trying to figure out how to calculate all the possible combinations of some given values.

there are 3 rows

[ ] = Checkboxes
1st: [ ] [ ] [ ] (3 checkboxes total)
2nd: [ ] [ ] [ ] [ ] (4 checkboxes total)
3rd: [ ] [ ] [ ] (3 checkboxes total)

rules:
1: It's not possible to keep every checkbox empty, there must be at least 1 checkbox checked on each row.
2: It's also possible to check multiple checkboxes on each row.

Example:

row 1 [v] [ ] [v]
row 2 [v] [v] [ ] [v]
row 3 [ ] [v] [ ]

How can I calculate every possible combination with these 3 rows, for 1 check per row, or 2 or 3 etc.
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October 2nd, 2012, 05:17 AM   #2
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Re: all possible combination with returning numbers

Total combos = 735.
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October 2nd, 2012, 05:43 AM   #3
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Re: all possible combination with returning numbers

Quote:
Originally Posted by Denis
Total combos = 735.
Ok, so how did you calculate this?
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October 2nd, 2012, 09:11 AM   #4
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Re: all possible combination with returning numbers

Quote:
Originally Posted by peewster
Quote:
Originally Posted by Denis
Total combos = 735.
Ok, so how did you calculate this?
In my head...
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October 2nd, 2012, 06:51 PM   #5
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Re: all possible combination with returning numbers

OK OK...
combos of 3 = 7 : 001,010,011,100,101,110,111

combos of 4 = 15 : 0001 to 1111

7 * 15 * 7 = 735
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October 4th, 2012, 09:51 AM   #6
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Re: all possible combination with returning numbers

Quote:
Originally Posted by Denis
OK OK...
combos of 3 = 7 : 001,010,011,100,101,110,111

combos of 4 = 15 : 0001 to 1111

7 * 15 * 7 = 735
Well there should be a formula for this stuff right.
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