Question

A = {x | x is prime number and 10 < x < 20} and B = {11,13,17,19}. Here A = B. Verify

Answer 1

A = {x | x is prime number and 10 < x < 20} 

∴ A = {11, 13, 17, 19} 

B = {11, 13, 17, 19} 

∴ All the elements in set A and B are identical.

∴ A and B are equal sets, i.e. A = B