Question

Given A = {x : x is an even number less than 10} 

B = {x : x is a prime number Less than 10}

 find A ∩ B.

Answer 1

Given A = (x : x is an even number less then 10} 

∴ A = {2,4, 6, 8} 

and B = {x : x is a prime number less than 10} 

∴ B = {2, 3, 5, 7} 

A ∩ B = {2,4, 6, 8} ∩ {2, 3, 5, 7} 

∴ A ∩ B = {2}