Let \mathfrak{X} be a set containing 32 elements, and let \mathfrak{Y} \subseteq \mathfrak{X} be a subset containing 29 elements. How many 2-element subsets of \mathfrak{X} are there which have nonempty intersection with \mathfrak{Y}?
Let \mathfrak{X} be a set containing 32 elements, and let \mathfrak{Y} \subseteq \mathfrak{X} be a subset containing 29 elements. How many 2-element subsets of \mathfrak{X} are there which have nonempty intersection with \mathfrak{Y}?