Creating Multiple Sounds For The Same Entity

Event trigger-triggered by external call or when (global trigger): Entity attacked
If is current entity (sub)type of [entity]
do
    if random[o,1) < 0.9
    do Play at x: x y: y z: z level: 1 pitch: 1 sound: (chosen sound)
    else if random[o,1) > 0.9
    do Play at x: x y: y z: z level: 1 pitch: 1 sound: (chosen sound)

This is the code for when it is attacked. If you want it to be death sounds, replace Entity attacked with Entity dies. For instance, I want the Golem to sound like a villager when it's hit. Okay, so, Here's how the code will be set up:

Event trigger-triggered by external call or when (global trigger): Entity attacked
If is current entity (sub)type of EntityIronGolem
do
    if random[o,1) < 0.9
    do Play at x: x y: y z: z level: 1 pitch: 1 sound: entity.irongolem.hurt
    else if random[o,1) > 0.9
    do Play at x: x y: y z: z level: 1 pitch: 1 sound: entity.villager.hurt

The 0.9 is an example. It can be any number. But if you want to make the sounds evenly used or something, make both numbers the same for both like mine. Hope this helps you!