Assignment:
Q1. Consider the multiset {n times a, 1,2,3,...n} of size 2n. Determine the number of its n- combinations.
Q2. Consider the multiset {n times a, n times b, 1,2,3...,n+1} of size 3n+1. Determine the number of its n- combinations.
Provide complete and step by step solution for the question and show calculations and use formulas.