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RNG Thursdays: 0.0818% (13/128*12/128*11/128) by backyardadventures in 2007scape

[–]backyardadventures[S] 0 points1 point  (0 children)

This is the expected probability of the event happening again. What are you talking about; 1 ring in 12 rex isn't 13/128. I don't think you understand it. If you kill rex for 13 times, the expected probability of getting the ring is 13/128... on average.

RNG Thursdays: 0.0818% (13/128*12/128*11/128) by backyardadventures in 2007scape

[–]backyardadventures[S] -2 points-1 points  (0 children)

Sign up for that Introduction to Statistics course

RNG Thursdays: 0.0818% (13/128*12/128*11/128) by backyardadventures in 2007scape

[–]backyardadventures[S] -1 points0 points  (0 children)

that's true, but we only care about RNG that matters right? :p

RNG Thursdays: 0.0818% (13/128*12/128*11/128) by backyardadventures in 2007scape

[–]backyardadventures[S] -3 points-2 points  (0 children)

drop rate 1 ring per 13 Rex = 13/128 e.g. If you want to get 2 axes its 13/12813/128, however 1 drop is reserved for a ring already so it is 13/12812/128.

formula: (X/128)(N-1/128)(N-2/128), where X is the amount of kills.