Zulrah Drop Table is not wrong as it says ingame.
I know it can be misleading to people who don't know that Zulrah's drop table works a bit different.
Zulrah has a normal drops table, and a rare drops table.
You get 2x rolls each kill, so 2x rolls to land on the rare drop table.
I assume Bag of riches is not the 'rare drop table' for Zulrah, since it isn't considered a Zulrah unique.
The rare drop table consists of:
- Uncut onyx : 1/150 (= 2/300)
- Tanzanite fang : 1/300
- Magic fang : 1/300
- Serpentine visage : 1/300
As you can see, the chance of hitting the rare drop table is 1/300 each roll, so actually 1/150 each kill to land on it.
Notice how the Uncut onyx is 2/300. Let's say we specifically are grinding for the Tanzanite fang. How do we calculate our chance of getting one?
We take the sum of the amount of items in the rare drop table, which is 2 + 1 + 1 + 1 = 5.
Now we multiply 5 by its chance to just hit once the rare drop table, 5 * 300 = 1500. This means, on each roll, we have a 1/1500 chance to get the Tanzanite fang drop.
We know, we have 2x rolls each kill, so we actually have 1/1500 + 1/1500 = 2/1500 = 1/750 chance each kill to get a Tanzanite fang drop.
I hope this clears up the confusion about the Zulrah drops. EDIT: See Batty's comment below if Bag of Riches is indeed on the 'rare drop table' for Zulrah ( even lower drop chance )
