If A = {x: x is a prime number}
B = {x: x is an odd natural number}
Then A ∩ B is
{3, 5, 7, 11, 13, 17, - - - -}
A ∩ B is defined as set in which the elements common in both A & B are present.
A = {2, 3, 5, 7, 11, 13, 17, - - - -}
B = {1, 3, 5, 7, 9, 11, 13, 15, 17, - - -}
A ∩ B = {3, 5, 7, 11, 13, 17, - - - -}