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Pet Drop Rate Formula:
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The pet drop rate formula calculates the probability of obtaining at least one pet drop after a certain number of attempts in Old School RuneScape. It's based on the complementary probability of not getting the pet in any attempt.
The calculator uses the pet drop rate formula:
Where:
Explanation: The formula calculates the probability of getting at least one successful drop by subtracting the probability of not getting the drop in all attempts from 1.
Details: Understanding drop probabilities helps OSRS players estimate the number of attempts needed for rare pet drops, plan their gameplay time, and set realistic expectations for obtaining rare items.
Tips: Enter the drop probability per attempt (typically a very small decimal like 0.0001) and the number of attempts you plan to make. Both values must be positive numbers with probability between 0 and 1.
Q1: What does this probability represent?
A: It represents the probability of getting at least one pet drop after k attempts, not the probability of getting exactly one drop.
Q2: How accurate is this calculation?
A: The calculation is mathematically precise for independent events with constant probability, which applies to most OSRS drop mechanics.
Q3: What are typical pet drop rates in OSRS?
A: Pet drop rates vary widely from 1/1000 to 1/10000 or even rarer, depending on the specific pet and activity.
Q4: Does this account for dry streaks?
A: The formula shows the probability after k attempts but doesn't guarantee a drop. Players can still go much longer than expected due to RNG.
Q5: Can I use this for other drop calculations?
A: Yes, this formula works for any item drop calculation in OSRS where the drop probability remains constant across attempts.