Are there three PBEs installed in the cabin of the ERJ 175 aircraft?

The correct answer is based on the standard configuration of the ERJ 175 aircraft, which typically includes safety and emergency equipment strategically placed throughout the cabin. In this aircraft model, three Portable Breathing Equipment (PBE) units are generally installed to ensure cabin crew members have immediate access to oxygen in the event of smoke or other emergencies that may compromise air quality. This arrangement is part of the safety protocols and emergency preparedness measures that airlines implement to protect passengers and crew, demonstrating the importance of being equipped for a range of in-flight scenarios. Therefore, stating that there are three PBEs installed in the cabin of the ERJ 175 is accurate and reflects standard safety regulations.