Question: Set A contains 7 elements, set B contains 21 elements, and 6 elements are common to sets A and B. How many elements are in

Set A contains 7 elements, set B contains 21 elements, and 6 elements are common to sets A and B. How many elements are in Upper A union Upper B? Question content area bottom Part 1 The number of elements in Upper A union Upper B is enter your response here

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