The feasibility region of an LP problem in variable x and...

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The feasibility region of an LP problem in variable x and y is given by the following constraints, in addition to the non- negativity constraints.
y ≤ 60; x ≤ 90; x + y ≤ 70
The numbers of corner point feasible solutions for this problem are

A. 3

B. 4

C. 5

D. 6

Answer: Option B

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