In Alphabetical Order
Difficulty: Easy · Topics: Discrete Mathematics, Combinations
A=\a,b,c,d,e,f\
In how many of the 4-permutations of A are the letters in alphabetical order?
Difficulty: Easy · Topics: Discrete Mathematics, Combinations
A=\a,b,c,d,e,f\
In how many of the 4-permutations of A are the letters in alphabetical order?