1. 14. (a) (i) What are the essential characteristics of dynamic programming
problems? (8)
,
(ii) What is dynamic programming? How a problem is solved using the
dynamic programming method? (8)
Or
(b) Solve the following LPP using dynamic programming approach: (16)
Max. Z =3x1 +5x2
Subject to:
x2 ~6
3x1 +2X2 ~ 18
and xl' x2 ~ O.
15. (a) Ther~ are three typists, in an office. Each typist can type an average of
6 letters per hour. Ifletters arrive for being typed at the rate of 15 letters
per "hour.
(i) What fraction of the time all the typists will be busy?
(ii) . What is the average number of letters waiting to be typed?
(iii) What is the average time a etter has to spend for waiting and for
being typed?
(iv) What is the probability that a letter will take longer than 20 min
waiting to be typed and being typed? (16)
Or
(b) A 2-person barber shop has 5 chairs to accommodate waiting customers
potential customers, who arrive when all 5 chairs are full, leave without
entering barber shop. Customers arrive at the average rate of 4 per hour
and spend an average of 12 min. in the barber's chair. Compute
Po,~, P." E(Nq) and E(W). (16)
I
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