Let S={1,2,3,…11} and T1,T2…,TN be distinct subsets of S such that |Ti∩Tj|≤2 for all values i≠j.
What is the maximum possible value of N?
(The empty set is a subset of every set.)
2 answers
232 is right
Thank you :)
but if u don't mind,can u explain it?
but if u don't mind,can u explain it?