Ways to score 42 with 3 rolls of a 20 sided dice
Source: Bangladesh Mathematical Olympiad 2021 Problem 5
February 20, 2022
combinatorics
Problem Statement
How many ways can you roll three 20-sided dice such that the sum of the three rolls is exactly ? Here the order of the rolls matter. (Note that a 20-sided die is is very much like a regular 6-sided die other than the fact that it has faces instead of )