2023 AIME II Problem 11


Find the number of collections of 1616 distinct subsets of {1,2,3,4,5}\{1, 2, 3, 4, 5\} with the property that for any two subsets XX and YY in the collection, XYX\cap Y \neq \emptyset.


Leading zeroes must be inputted, so if your answer is 34, then input 034. Full credit goes to MAA for authoring these problems. These problems were taken on the AOPS website.

Show/Hide Hints

Show/Hide Problem Tags

Problem Tags: No tags

Want to contribute problems and receive full credit? Click here to add your problem!
Please report any issues to us in our Discord server
Go to previous contest problem (SHIFT + Left Arrow) Go to next contest problem (SHIFT + Right Arrow)
Category: AIME II
Points: 5
Back to practice