It's about 5-20 rooms per house hold in Mexico.
In America where the average person lives in a middles class home the average amount of bathrooms would be two. Most homes have at least a one and a half bath and many also have up to three. Two...
About 10-20 thousand depending on the house and the type of electrical device.
3-4
5 feet Egress for a bedroom requires a 3' x 5' window , minimum. Therfore it is a common size, refered to as a 3 O 5 O .