Pls tell answer s

Dear Student,
Solution) 4) Given: n(A) = 10 and n(B) = 15
A = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
B = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}
Then n(A$\cap$B) = (0, 10)
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