Question: An assembly line has three stations through which every unit being produced must pass in the same fixed order. The arrival of units follows a

An assembly line has three stations through which every unit being produced must pass in the same fixed order. The arrival of units follows a Poisson process for all stations. The mean time between arrivals is 8 minutes. The stations operate independently, and queues are allowed to form in front of each station. All stations have same mean processing time of 4 minutes. If processing time at each station has an exponential distribution. The total spent minutes in the assembly line for each unit is: a. Less than 12.1 O b. Greater than or equal to 12 but less than 24. Oc. Greater than or equal to 24 but less than 27 Od. Greater than or equal to 27

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