432
edits
Drop rates: Difference between revisions
From Melvor Idle
no edit summary
No edit summary |
|||
| Line 32: | Line 32: | ||
<math>P \approx 1 - \left ( \dfrac{1}{2.718} \right ) ^ {\left ( \dfrac{n}{k} \right )}</math> | <math>P \approx 1 - \left ( \dfrac{1}{2.718} \right ) ^ {\left ( \dfrac{n}{k} \right )}</math> | ||
For example, for the {{ItemIcon|Chapeau Noir}} there is a 1 in 20,000 (k) chance of this item dropping, and 100 attempts gives a probability of: | For example, for the {{ItemIcon|Chapeau Noir}} there is a 1 in 20,000 (k) chance of this item dropping, and 100 attempts gives a probability of: | ||
| Line 46: | Line 44: | ||
<math>n = \left \lceil \dfrac {ln(1 - P)} {\ln \left (\dfrac{(k - 1)}{k} \right )} \right \rceil</math> | <math>n = \left \lceil \dfrac {ln(1 - P)} {\ln \left (\dfrac{(k - 1)}{k} \right )} \right \rceil</math> | ||
For those unfamiliar with math notation, the outer brackets just mean take the largest whole number. | |||
If the drop-rate is low which ''is'' typical for rare drops then you can approximate this as: | If the drop-rate is low which ''is'' typical for rare drops then you can approximate this as: | ||
