A wharf-side fish market sells live fish from its tank during the afternoon. The tank can hold at most 12 fish. During the morning, fish are caught from local waters and used to restock the tank. The number of fish caught, F, has the following mass function. 0.1 f=0
0.2 f=1
0.3 f=2
0.2 f=3
0.1 f=5
If there is not enough room in the tank for the number of fish caught, then the excess is sold to local restaurants for $12/fish. Consumer demand during any day (D) for live fish has the following probability mass function.
0.2 d=0
0.2 d=1
0.3 d=2
0.2 d=3
0.1 d=4
The cost to catch each fish is about $4.00/fish caught plus a fixed fuel surcharge of $20/day. The selling price out of the tank is $20.00. Assume a Markov model is desired where the state of the system is defined to be the number of fish in the tank at the end of each day
a) Create the P matrix for this problem.
b) Solve for the steady state probabilities ( 's) for your model
c) Answer the following questions using these π's as needed. (Subliminal hint: Don't forget about the Law of Total Probability.)
1. What is the expected number of fish in the tank?
2. What is the expected daily cost of getting fish?
3. What is the revenue from fish sold to restaurants?
4. What is the expected number of lost sales per day?