Kenneth S. answered • 05/18/16
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Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018
Given a set (say, {a, b, c, d}, then {a, b} and {c,d} and {a,c} and {a,d} and (b,c} and {b,d} are all distinct subsets having cardinality 2. The particular combinations of two elements take from the original full set are all distinct (you can look at this as they're spelled differently).
Other distinct subset (some containing exactly three elements, others containing exactly one element) also exist--each of all of these proper subsets being a unique set of choice(s).
