@bmtran, could you please specify the problem to a greater detail? Are there any constraints such as: each member should read at least one book? Do permutations of who reads which book matter? Cheers, VL.
Same for me... i'm not sure if I understand the problem correctly... If my combinatorics is right, the solution should simply be factorial(k)/factorial(k-n) but apparently this is not the case... I assume I'm misinterpreting something???
sorry if i wasn't clear enough. i'm revising my question to be more specific now
Mathematical Reformulation: How many K-letter words can be formed using N-letters if repetition of letters is allowed and each letter appears at least once?....Hint: A closed form solution exist aside the brute force solutions.
Find the alphabetic word product
String substitution, sub problem to cryptoMath
Matrix with different incremental runs
Subtract two positive numbers
Put Two 1D matrices into one 1D matrix
Next Higher Power of B
Test if two numbers have the same digits
Set a Soroban Abacus
Reverse the Words (not letters) of a String
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