6. If the cost price of 20 articles is equal to the selling price of 15 articles, find the profit percent.

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A: Given data:- A=23-1012B=3-120-11

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A: Given problem:-

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A: Please see the below picture for detailed solution.

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A: Let's find elements of subspace.

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A:

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A: Given :A=3216

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A: Matrix transformation is used.

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A:

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A: Please refer to the image below

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A: Cost of cooker = RM89  Profit percentage= 35%

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A: Here is the solution

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A:

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A: Recall: PA∩B∩C=P(A)P(B)P(C)

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A: Given.

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A:

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A: Please refer to the image below

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A: Let's solve.

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A:

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A: We can simplify the given expression by using the cross multiplication method.

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A: We can answer the question as below.

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