Which of the following conditions are necessary for applying linear programming?

These must be a well defined objective function.
The decision variables should be interrelated and non-negative.
The resources must be in limited supply.
all of the above
✅ The correct answer is option D.

Work study is mainly aimed at

determining the most efficient method of performing a job
establishing the minimum time of completion of a job
developing the standard method and standard time of a job
economising the motion
✅ The correct answer is option A.

A feasible solution to the linear programming problem should

satisfy the problem constraints
optimise the objective function
satisfy the problem constraints and non-negativity restrictions
satisfy the non-negati
✅ The correct answer is option C.