How many oxygen masks are available in the flight deck of a CRJ900?

In the CRJ900 aircraft, there are three oxygen masks available in the flight deck. This setup typically includes masks for both pilots to ensure that they have access to supplemental oxygen in the event of cabin depressurization or other emergencies requiring additional oxygen supply. The inclusion of three masks accommodates various scenarios, allowing for proper emergency preparedness and ensuring that both pilots can maintain their effectiveness while managing critical situations. This design feature emphasizes safety and functionality in the cockpit environment.