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# Boolean matrix? Watch

1. How do i work this question out?

c) Five different companies James Plc, Smith Ltd., Davis
Electronics, Smart Plc and Peters Electronics produce TV‟s, DVD players and CD players. The following table shows the annual profits which these companies make from these products:-

Annual Profits in £millions

James Smith Davis Smart Peters
TV‟s 8 6 7 2 5
DVD‟s 16 11 12 8 18
CD‟s 15 26 18 10 17

Consider the relation worse_than defined on the set
S = {James, Smith, Davis, Smart, Peters} as follows:-
x worse_than y if, for at least two products, the annual profit for the product for company x is less than the annual profit for the product for company y.

You are required to write down the boolean matrix of the relation worse_than.

All help appreciated thx
2. (Original post by Robbo17710)
...
Start with the bare bones of the matrix, and put in the descending diagonal, and then work systematically through each pair of companies.

That's the outline, as I don't know how much you can do yourself. What's causing the problem with this question?

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