Let X= 1,2,3,4,5 . The number of different ordered pairs (Y,Z) that can be formed such that Y X, Z X and Y Z is empty, is (AIEEE 2012)

JEE Main Mathematics question

Let . The number of different ordered pairs that can be formed such that , and is empty, is (AIEEE 2012)

Answer: (A)

Each element of is in only, in only, or in neither: ordered pairs.

Question ID VK-003260