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Sir,
In Linear programming using graph is it always that we will assume the contribution on our own while drawing and solving as in lecture you assumed 90 for the contribution in your example. If it will be an assumption then we can have any value in feasible area giving the correct answer??
Thanks in advance
You can choose any value for the total contribution, because the angle of the line will be the same and it is only the angle of the line that matters.
(Do remember though that you cannot be asked to actually draw the graph in the exam)
What if I choose the value for example as the demand for x or y given for calculating the contribution.
I have done one of the past papers question relating to this topic where I chose the value of sale for X, my answer was different from the examiner’s answer.
The figure you are choosing for the total contribution again does not matter, but there is not much point in using the level of demand (the demand is in units but the contribution is in $’s). It is impossible for me to know why your answer was different – the contribution line may be different, but the angle would be the same and the optimal solution would be the same.
It might help you to watch the lecture again 🙂
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