Question: 20. In a network flow problem, the values assigned to ________ typically represent distance, time, or cost. A. nodes B. edges C. source D. sink

20. In a network flow problem, the values assigned to ________ typically represent

distance, time, or cost.

A. nodes

B. edges

C. source

D. sink

27. Consider a constraint: 2x1 + 3x2 = 60. Assume that we convert this constraint into a goal constraint with the value of x1 = 15 and the value of x2 = 15. Then the values of d1+ and d1- are ________ and ________, respectively.

A. 0, 0

B. 0, 15

C. 15, 0

D. 15, 15

28. In AHP, if the CI/RI ratio is ________, then the pairwise comparison matrix can be regarded as consistent.

A. more than 0.10

B. not more than 0.10

C. more than 0.90

D. not more than 0.90

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