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Help needed for this simple problem, editorial not available

Revision en1, by Not_mee, 2023-08-20 19:06:57

Can anyone here explain me how to solve this Problem as there is no official editorial available . Thank You for your time in Advance

combinatorics

History

Revisions

	Rev.	Lang.	By	When	Δ	Comment
	en1		Not_mee	2023-08-20 19:06:57	250	Initial revision (published)