The figure shows two possible processes that a customer has to pass through to get two categories of services $-$ SI $($A$-$B$-$D$-$E$)$ and $$2($A$-$C$-$D$-$E$).$ The numbers in brackets are times in minutes that each step takes. What is the average hourly throughput if $60\%$ of the customers avail SI and $40\%$ avail $$2.$

A$)9\mathrm{.}1/$hr

B$)10/$hr

C$)8\mathrm{.}5/$hr

D$)12/$hr

A $(3)$

D $(5)$

E $(6)$

Ans:

Q$3.$ The earliest