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: n(B).

Answer 1

B = {x: x is a whole number divisible by 3 and x < 18}

B = {3, 6, 9, 12, 15, 18}

n (B) = 6