The tree ratio of 1 class to class 2 is 5: 4 = 15: 12, and the tree ratio of class 2 to class 3 is 3: 2 = 12: 8.

The tree ratio of Class One, Class Two and Class Three is 15: 12: 8.

15+ 12+8=35

Category I: 105× 15/35=45 trees.

Category II: 105× 12/35=36 trees.

Category III: 105×8/35=24 trees.