question_answer

Consider the following statements:            

1. A linear problem with three variables and two constraints can be solved by graphical method

2. For solutions of a linear programming problem with mixed constraints, Big-M-method can be employed

3. In the solutions process of a linear programming problem using Big-M-method which an artificial variable leaves the basis, the column of the artificial-variable can be removed from all subsequent tables.

Which of these statements are correct?

A) 1, 2 and 3                     

B) 1 and 2

C) 1 and 3            

D) 2 and 3