jlunn8375 jlunn8375 24-06-2024 Mathematics Answered Find the cardinal number of the indicated set. Use the cardinal number formula. If n(A) = 6, n(B) = 13 and n(A ∩ B) = 4, what is n(A ∪ B)? A. 14 B. 16 C. 15 D. 19