Pairs Sharing One Element
Difficulty: Hard · Topics: Discrete Mathematics, Sets, Subsets
The set A=\1,2,3,4,5,6\ is given.
B and C are three-element subsets of A with n(Bcap C)=1.
How many different ordered pairs (B,C) can be written?
Difficulty: Hard · Topics: Discrete Mathematics, Sets, Subsets
The set A=\1,2,3,4,5,6\ is given.
B and C are three-element subsets of A with n(Bcap C)=1.
How many different ordered pairs (B,C) can be written?