given that 7 element set a = 1234567 find the collection of t of 3 elements subset of aA such that each pair of element a occurs exactly in one the subset of T
Given: Element set a = {1,2,3,4,5,6,7}.
Now,
By taking any 3 elements of the set to make a list or collection of a 3 element subset, that is
{1,4,7} or {2,3,6} etc..
Therefore, the number of subsets are
Thus, there are 35 different unique 3 element subsets of a 7 element set.