Question

If A = {1, 4, 9}, B = {1, 2, 3} and C = {1, 3, 5}, find A $\cap$ (B $\cap$ C).

Answer 1

B $\cap$ C = { 1, 3}

A $\cap$ (B $\cap$ C) = {1, 4, 9} $\cap$ {1,3}

= {1}