Challenge #88: Counting Combinations

[Emily_P]

Done!

[uk_msmt]

Spoiler

[Eilean_]

rt

[Slacker]

My Solution

[OnionKnight]

This is really fun!!

[TraceyD]

Here's my solution:

[binuacs]

Spoiler

[Manonmani]

Here is my Solution

[Salvatore_Miseo]

Goodmorning everyone,
below I have attached my solution.

Nice exercise. In solving it I followed almost the same solution, but I concentrated on creating the object list of the possible combinations, also concatenating the transaction ID's.

This exercise is very useful for solving cross-selling marketing research problems.

 

[Airedelapaz]

I have a question/problem.  I have 19 distinct combinations.  I did not sort ascending after the filter step, as it appears that the file was already sorted in ascending order.  By excluding this step I end of up 19 instead of 12 distinct combinations.  Why is the sort necessary and how does it lower the distinct combinations from 19 to 12? 

Spoiler