Challenge #88: Counting Combinations

[MsBindy]

this was good;  made me think differently than I normally do.

[derekbelyea]

[mjholland]

I've gone a slightly different route than the solution but I'm happy with the approach …

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[svenk]

My Solutions!

[danilang]

I think I've got a unique solution here.

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I assign each product a unique power of 2 and then sum up each of the purchase lines and count the unique totals

Dan

[willstom1]

Here is my solution:

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[kat]

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[Wouter]

My solution:

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[EFran]

I had a bit of a problem with understanding the task. "How many combinations of the same objects were purchased" is not a good wording fro me.... "How many combinations of the same objects there were" would be better or "How many different shopping lists there were". It went quick after I understood it :)

[MattKing]

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I should have used Summary after the sort, instead of a cross-tab / transpose combination