Final answer:
The CRJ 700 and CRJ 900 typically have two over wing exit rows with exit doors and safety instructions.
Step-by-step explanation:
The CRJ 700 and CRJ 900 are aircraft models used in commercial aviation. They are both part of Bombardier's CRJ (Canadair Regional Jet) series. The number of over wing exit rows in an aircraft is determined by regulations set by aviation authorities, taking into account factors such as the number of passengers and the size of the aircraft.
In the case of the CRJ 700 and CRJ 900, they typically have two over wing exit rows. These rows are strategically located to provide passengers with a quick and safe means of evacuation in case of emergencies. Each exit row is equipped with over wing exit doors and additional safety instructions.