WarframeAlchemyLab ES
Contamination Casing

Farming plan

Contamination Casing

Arsenal: Contamination Casing
Dropped by
Fomorian Sabotage Rare 5 %
Blite Captain Uncommon 3 %
Profit-Taker Rare 2.56 %
Chance of getting it by number of runs
0% 25% 50% 75% 100% 12 24 37 49 61 14 runs · 50% 14 runs · 50% 45 runs · 90% 45 runs · 90%

Each run has a 5% chance. The curve is 1−(1−p)ⁿ: there is never a guarantee, only growing confidence.