Solution:  The standard all adult mass value is 84 kg for a non holiday charter. See CAP 696.  Therefore passenger weights are:

 

65 x 84 = 5460 kg (adults)

5 x 35 = 175 kg (children)

Total 5635 kg

 

MTOM         37200

-DOM           21600

-Fuel               8500

-Pax                5635

-Baggage         880

 

= Cargo           585 kg