The math seems to be off in a few places: 1. When solving for the arrival rate λ, it should be λ=ρ/S instead of λ=S/ρ. 2. Calculating the arrival rate λ with

The math seems to be off in a few places: 1. When solving for the arrival rate λ, it should be λ=ρ/S instead of λ=S/ρ. 2. Calculating the arrival rate λ with the correct formula results in 9 requests/second instead of 10 request/second. 3. Calculating the new utilization ρ should be 0.05x9 instead of 0.05x10. The result of the calculated utilization ρ is correct (0.45), so is the calculated new latency. edit: new lines