How many two-element subsets of <1, 2,3,4,5,6> are there that do not contain the pair of elements 2 and 4? Choose the correct option:
A) 11 B) 12 C) 14 D) 15 E) 16
6142 - 1 = 14 Answer is 14
<result>C</result>
How many two-element subsets of <1, 2,3,4,5,6> are there that do not contain the pair of elements 2 and 4?