Counting & ProbabilitySuperchallengeCounting & Probability ShareCounting & Probability · Superchallenge problemHow many functions f:{1,2,3,4,5}→{1,2,3,4,5}f:\{1,2,3,4,5\}\to\{1,2,3,4,5\}f:{1,2,3,4,5}→{1,2,3,4,5} satisfy f(f(x))=f(x)f(f(x))=f(x)f(f(x))=f(x) for every xxx?Check Show answer Walk through it step by step Practice more like this Review this concept