In detail

The children of the Pérez family

The children of the Pérez family

In the Pérez family, each daughter has the same number of brothers as sisters and each son has twice as many sisters as boys.

How many sons and daughters are in the Pérez family?

Solution

They are 3 brothers and 4 sisters.

Each male child has 2 brothers and 4 sisters while each daughter has 3 brothers and 3 sisters.