Randomly drop items

I am making a map where i want a specific type of creature to drop an item randomly. What this means is that 1/50 of these monsters will drop the item.

My current trigger goes as:


Troll Axe
Events
Unit - A unit Dies
Conditions
(Owner of (Dying unit)) Equal to Neutral Hostile
Or - Any (Conditions are true)
Conditions
(Unit type of (Dying unit)) Equal to Troll Youngblood
(Unit type of (Dying unit)) Equal to Troll
Actions
???


I need to know how to fill up this area. I want the Troll Axe to fall at the feet of the slain troll. (Item is dropped 2% of the time when one of those 2 are killed.)

Add to conditions:

"(Random integer between 1 and 50) equal to 1"

And then to actions:

"Create <Troll Axe> at <Position of dying unit>"