how to pair pairs in combinatorics how to pair two sequences together with one other in combinatorics when do you pair elements together in sequence what sequence is $y when using ordered combinations what is the order of ordered combinations can a sequence be ordered in a sequence what is the order of ordered combinations what is a sequence of ordered combinations ordering combinatorics paired combinatorics definition what order do ordered combinations occur how are ordered combinations used in combinatorics how to pair elements in order how are ordered combinations grouped together how is a sequence ordered how do you pair up two sequences how do you use ordered sequences? what is the order of ordering i order elements in combinatorics