Operations Research

121. The transportation problem is balanced, if ______________.

1. total demand and total supply are equal and the number of sources equals the number of destinations.
2. none of the routes is prohibited
3. total demand equals total supply irrespective of the number of sources and destinations
4. number of sources matches with number of destinations

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122. In an assignment problem involving 5 workers and 5 jobs, total number of assignments possible are ______________.

1. 5
2. 10
3. 15
4. 20

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123. All of the following are assumptions of the EOQ model except ______________

1. the usage rate is reasonably constant
2. replenishment is not instantaneous
3. only one product is involved
4. there are no quantity discount price

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124. Average number of trains spent in the yard is denoted by ______________.

1. E(n)
2. E(m)
3. E(v)
4. E(w)

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125. Graphical method of linear programming is useful when the number of decision variable are ______________

1. 2
2. 3
3. 4
4. 5

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126. The cost of a surplus variable is ______________.

1. 0
2. 1
3. 2
4. -1

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127. The dual of the dual is ______________.

1. dual-primal
2. primal-dual
3. dual
4. primal

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128. Solution of a Linear Programming Problem when permitted to be infinitely large is called ______________.

1. unbounded
2. bounded
3. optimum solution
4. no solution

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129. When the total demand is not equal to supply then it is said to be ______________.

1. balanced
2. unbalanced
3. maximization
4. minimization

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130. All equality constraints can be replaced equivalently by ______________ inequalities

1. 1
2. 2
3. 3
4. 4

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