Question

If A = {x: x is natural number divisible by 2 and x< 16} and

B = {x:x is a whole number divisible by 3 and x < 18}, find: A ∩ B and n (A ∩ B).

Answer 1

A n B = {2, 4, 6, 8, 10, 12, 14} n {3, 6, 9, 12, 15, 18}

A ∩ B = {6,12}

n(A ∩ B) = 2