WarframeAlchemyLab ES
Necramech Repair

Farming plan

Necramech Repair

Arsenal: Necramech Repair
Dropped by
Operation: Orphix Venom, Rotation C Uncommon 14.29 %
Operation: Orphix Venom, Rotation A Rare 6.52 %
Deimos Jugulus Rex Rare 4.42 %
Chance of getting it by number of runs
0% 25% 50% 75% 100% 4 8 13 17 21 5 runs · 50% 5 runs · 50% 15 runs · 90% 15 runs · 90%

Each run has a 14.29% chance. The curve is 1−(1−p)ⁿ: there is never a guarantee, only growing confidence.