How Is This Possible That This Happened?

Riddle: There are 10 people in a household. The brother has 7 sisters, How is this possible?

Answer: There is a mom(1), Dad(2), 7 Sisters(9), and 1 brother(10)!

Source: https://www.riddles.com/index.php/11524

There are 10 people in a household. The brother has 7 sisters, How is this possible? — How is this possible that this happened? by Annabelle Carrico v1.

Riddle: There are 10 people in a household. The brother has 7 sisters, How is this possible? Answer: There is a mom(1), Dad(2), 7 Sisters(9), and 1 brother(10)! — by Annabelle Carrico v2.