RSorder OSRS: With the lockbox considered
If you kill Yama solo, the odds of getting any Oplate piece are 1 in 200, or 1 in 600 for a specific piece. Using the coupon collector problem, we can calculate the expected KC to RuneScape gold complete a full set:
Average KC=200×3×1.83≈1,100
Average KC=200×3×1.83≈1,100
So, purely from direct drops, you'd expect to complete your Oplate set after around 1,100 solo kills.
In a duo, your drop rates scale with your damage contribution. Doing 50% of the damage reduces your odds to 1 in 400 (or 1 in 1,200 for a specific piece). Doing 60% of the damage improves this slightly to 1 in 333.
Time Analysis


Businesses exploring website development often begin by asking how to choose a web designer with the right experience. The College of Contract Management provides an Advanced Diploma focused on web design and digital development. The modules explore design planning and website functionality. These areas are important in professional web creation.