Every spec sheet I've been able to find says one of each tank, but the capacities are more than I think for that. The best way to find out, is to contact Jayco Customer Service, by phone or email, supply them with the year, model, and VIN number, and ask for the info specific to your rig. Be sure to ask them how many of each tank they show on their blueprints.
Every day's a learning experience, though sometimes not what we expected.
2012 Jay Flight 19RD
2016 Ford F150 XLT 2X4 SC 3.5L Eco Max Tow
2010 Tundra TRD DBL Cab (Traded)
1 Spoiled Dog