Multisets k-combination of S k-subset of S without repetition 3-combinations of S={1,2,3,4 without repetition: {1,2,3},{1,2,4},{1,3,4},{2,3,4} with repetition: {1,1,},{1,1,2},{1,1,3},{1,1,4},{1,2,2},{1,3,3} {1,4,4},2,2,2,{2,2,3},{2,2,4},2,3,3},{2,4,4, {3,3,3},{3,3,4,3,4,4,{4,4,4Multisets k-subset of S “k-combination of S without repetition” 3-combinations of S = { 1, 2, 3, 4 } without repetition: {1,2,3}, {1,2,4}, {1,3,4}, {2,3,4} with repetition: {1,1,1}, {1,1,2}, {1,1,3}, {1,1,4}, {1,2,2}, {1,3,3}, {1,4,4}, {2,2,2}, {2,2,3}, {2,2,4}, {2,3,3}, {2,4,4}, {3,3,3}, {3,3,4}, {3,4,4}, {4,4,4}