Question: U = {1, 2, 3, 4, 5, 6, 7, 20, 30 }, A = { 1, 3, 4, 5} B = { 4, 5, 6,

U = {1, 2, 3, 4, 5, 6, 7, 20, 30 }, A = { 1, 3, 4, 5} B = { 4, 5, 6, 7, 8, 6} How many elements on the Universal set? Option A 9 Option B 4 Option C 20 Option D 6

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