items on spawned units?

i was making a hero seige type map, where the attacking units are spawned. i was wondering if i could make them have a item table or something of the same effect, where the units drops items x% of the time. any one know how?

if you want a random drop create an Integer variable.

Event:
Unit dies
Conditions:
Unit-type of dying unit equal to [last created unit] (or whatever)

Actions
Set DropRandomizerVariable = Random number between 1 and 10
If - Conditions:
DropRandomizerVariable equal to 5
Then Actions:
Create item-type at position of dying unit
If Else actions:
Do nothing

if you want a higher chance just adjust your randomizer.