# D1 Question....Watch

#1
Hi all....Ive been self teaching D1 and I was doing simplex algorithm and it was all good untill I came to this problem....

The marketing director of an insurance company has a budget of £100,000 for half - page advertisements in three specialist magazines. Details of the circulations and advertising costs of these magazines are as shown.

Magazines Circulations Cost
Smart Savings 80 000 1000
Capital Investor 120 000 2000
Money Monthly 200 000 2500

The director is instructed that the average circulation for each advertisement should be at least 100 000 and that no more than £40,000 should be spent on any one magazine. What is the maximum number of advertisements she can place and how can she achieve this?

I am not worried about the actual solution by using the algorithm but Im having trouble in formation of this problem....I have managed to find all the constraints in terms of cost and circulations by using variables a,b,c and x,y,z for the number of advertisements.....

Can any1 help me to find the objective function of this LP?

Any guidance will greatly help me...Thank you.
0
9 years ago
#2
awhh you've had 16 views but no replies, must be a hard question, I started D1 today but still a beginner so I wouldn't be of any help tbh sorryyyyy, I know my post is pointless but I felt bad because you hadn't had an answer yet....

good luck!
0
#3
hehe thnx......all the topics are in D1 are fairly easy apart from simplex algorithm...which is not that complicated once u r familiar with it.....and some questions about formations like the one ive posted......still trying to figure out the OF......

....but good luck with D1!
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#4
any1?
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9 years ago
#5
I'm a bit out of practice with these sorts of things, I did D1 2 years ago, so if I'm wrong then sorry about that, but since no one else has answered I thought I'd give it a go. As far as I remember, the objective function states what it is you are trying to do, which in this instance is to maximise the number of adverts. If you call the different types of advert x, y and z, then I think the objective function would be along the lines of: Maximise I = x+y+z.
As I said I may be wrong as I can't really remember! Anyway good luck with it!
0
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