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How many combinations of 16 items in four groups of four?

There are 16 items in 4 groups of 4. The order in the groups doesn't matter, nor does the order of the groups. So 1 2 3 4 and 2 4 1 3 would count as one group. The combination of groups as 1 2 3 4, 5 6 7 8, 9 10 11 12,13 14 15 16. and 5 6 7 8, 13 14 15 16, 1 2 3 4, 9 10 11 12 count as one. And mixing both still counts as one. I can get the number of possible combinations in each step, but have no idea how to filter out repeats.

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Andrew Bondarenko

Lvl 1
3y ago
Updated: 8/15/2021

4

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Quansahg121

Lvl 2
3y ago

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