Use the formula for the cardinal number of the union of two sets to solve the problem. Set A contains 7 elements, set B contains 15 elements, and 5 elements are common to sets A and B. How many elements are in AUB? O A. 17 O B. 22 O C. 16
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We need to use the formula for the cardinal number of the union of two sets. The formula for the cardinal number of the union of two sets A and B is: $|A \cup B| = |A| + |B| - |A \cap B|$ Where: $|A|$ is the number of elements in set A. $|B|$ is the number of Show more…
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