Setting drop spawn chance of random items

How would I set the percentage chance for a defeated enemy to drop an item and how could I make it a random item from a set of, say, 6 objects?

for me i have a enemy ON created event that have an action that puts a random number in a instance variable between 1 and zero [action would be set variable round(random(0,1)) ] then a on destroyed event that and the condition that if the IV=1 spaw n Family from a family i made that has all the object i want it to pick from ....when u create a family object it spawns a random thing from that family ...

that's how i do it there might be i different way but this way is really easy to set up

One way to do it is with the choose() expression.

on enemy destroyed - set variable to choose(0,0,0,0,0,1,1,1,2,2)

• if variable = 0 : don't spawn
• if variable = 1 : spawn object 1
• if variable = 2 : spawn object 2

the chance of this being 0 = 0.5

the chance of this being 1 = 0.3

the cahnce of this being 2 = 0.2

I hope this won't be considered necroposting but thanks LittleStain and volkiller730 - I just used these ideas!