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There are sets A and B with the following cardinalities. |U| = 54, |A| = 18, |B| = 29, |A-B|=10, What is |AUB|?

There are sets A and B with the following cardinalities.

|U| = 54,

|A| = 18,

|B| = 29,

|A-B|=10,

What is |AUB|?

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