Note the following: jA \ Bj D jAj C jBj jA [ Bj. Find a general formula for the size of
Chapter 19, Problem 19.9(choose chapter or problem)
Note the following: jA \ Bj D jAj C jBj jA [ Bj. Find a general formula for the size of the intersection of several finite sets in terms of the sizes of their unions.
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