A local bank branch employs two tellers: Quick Richard can help a customer in ex

Question

A local bank branch employs two tellers: Quick Richard can help a customer in exactly 4 minutes, while it takes Slow Paul Oke exactly 12 minutes. On average, 10 priority customers and 3 normal customers arrive at this bank per hour (in a random fashion). If we are only concerned about the waiting time of the priority customers, then what should we do?

A) Let Quick Richard help priority customers and Slow Paul Oke the normal customers.

B) It doesn’t matter which of the other options we go for.

C) Let Quick Richard help normal customers and Slow Paul Oke the priority customers.

D) Create one queue and let Quick Richard and Slow Paul Oke assist all customers in first come-first served fashion (no priority).

Explanation / Answer

Quick richard can help a customer in exactly 4 minutes whereas Paul Oke takes 12 minutes. Around 10 priority customers and 3 normal customers arrive at this local bank per hour each day. If we are only concerned about the priority customers, then we have to let Quick Richard help priority customers and let Slow Paul Oke help the normal customers because the quantity of coming priority customers per hour is more than the quantity of normal customer and if Slow Paul Oke help priority customers then it is not easy for us to help each and every customers either they are priority customers or they are normal customers per hour.

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