Intersection Requirement

Probability Level 4

How many ordered pairs (A,B) (A, B) , where A,BA, B are subsets of {1,2,3,4,5} \{ 1, 2, 3, 4, 5\} are there, such that AB=1 | A \cap B | = 1 ?

Details and assumptions

Students who are unfamiliar with Set Notation can refer to the blog post on Set Notation for definitions.

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