Quote Originally Posted by tachikoma View Post
one thing that should have been shown in the OP's post is the total # of chests opened vs the total # of weapons collected, by saying 100 fights and # of drops its not very impacting especially from the perspective of the endgame community BUT by saying u opened:

800 chests and collected a total of 88 drops. pretty close to a 10% drop rate of any weapon.

Probability:

x=10% drop rate (1/7 at the weapon you want)===>.7%{effective drop rate}
y=100 (number of runs)

1 - ( ( 1 - x ) ^ y ) = 1 - ((1-.007)^100) = 0.50463553464414735617482632768592

basically you have just over a 50% chance to get your desired weapon if you kill ifrit 100 times. I have played a lot of MMO's and this type of drop rate is not what I would consider casual or reasonable. Less then a 1% drop rate and ppl say things like:
Solid post but 10% x 1/7 is not 0.7% Its 1.43%

Through 100 runs you have a 75% chance of getting the weapon you need.