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Answer :
Given, Cost price of VCR=₹ 8,000.
And Loss=4%
∴ \(SP=CP\; (1-\frac{loss}{100}\))
\(\Rightarrow SP=8000\; (1-\frac{4}{100}\))
\(\Rightarrow SP=8000\;\times (\frac{96}{100}\))
\(\Rightarrow SP=₹\; 7,680\)
Also given that, Cost price of TV=₹ 8,000
And profit=8%
∴ \(SP=CP\; (1+\frac{Profit}{100}\))
\(\Rightarrow SP=8000\; (1+\frac{8}{100}\))
\(\Rightarrow SP=8000\;\times (\frac{108}{100}\))
\(\Rightarrow SP=₹\; 8,640\)
So we have total SP=₹ 8,640 +₹ 7,680=₹ 16,320
So we have total SP=₹ 8000 + ₹ 8000 =₹ 16,000
Therefore, Profit=SP-CP
=₹ 16,320- ₹ 16,000
=₹ 320
∴ Profit % on the whole transaction=\(\frac{Profit}{Total\; CP}\times100\)
\(\qquad = \frac{320}{16000}\times 100 =2\)%
Hence, the shopkeeper gained 2% profit on the whole transaction.