Diketahui: A={lima bilangan prima yang pertama} B={X/X <18, X E bilangan ganjil} A n B adalah

Himpunan A
= {2,3,5,7,11}

Himpunan B
= {1,3,5,7,11,13,15,17}

Maka
A n B => A iris B
= {3,5,7,11}

A = {2, 3, 5, 7, 11}
B = {1, 3, 5, 7, 9, 11, 13, 15, 17}
A n B = {3, 5, 7, 11}