Mathematics, 04.10.2021 14:00 flowersthomas1969

A and B are finite sets. |A| = 20, |A⋃B| = 23, and |A∩B| = 7. Find |B| I have trouble figuring how this works, any solutions will help me better understand.

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A and B are finite sets. |A| = 20, |A⋃B| = 23, and |A∩B| = 7. Find |B| I have trouble figuring how...

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