Problem
80% of the arrivals to a COVID19 vaccination center pre-register themselves on the COWIN portal before arriving whereas the rest walk in and register at the venue. Pre-registered individuals verify their registration upon arrival and then proceed to one of the vaccinators. Walk-ins visit the registration desk and then proceed to one of the vaccinators. Verification step (including waiting) takes 5 minutes whereas registration step (including waiting) takes 15 minutes. Vaccination (including counselling) takes 5 minutes and is preceded by an additional waiting time of 10 minutes. Individuals spend 10 minutes after vaccination (instead of the recommended 30 minutes) to allow observation of adverse reactions to the vaccine. On average, there are 240 individuals in the vaccination camp excluding staff (all staff at the vaccination camp are vaccinated).
• Question I: What is the average hourly rate of vaccination?
• Question II: How many individuals present at the vaccination center on average are unvaccinated? (Assume the actual time required for vaccine administration itself is negligible.)