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  1. Chapter 8 Class 8 Comparing Quantities
  2. Serial order wise
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Transcript

Ex 8.2, 5 A VCR and TV were bought for Rs 8,000 each. The shopkeeper made a loss of 4% on the VCR and a profit of 8% on the TV. Find the gain or loss percent on the whole transaction. Given, Cost Price (CP) of VCR and TV = 8000 each Total Cost Price (CP) = Cost Price of VCR + Cost Price of TV CP = 8000 + 8000 CP = 16000 Total Selling Price (SP) = Selling Price of VCR + Selling Price of TV Selling Price of VCR Cost Price = 8000 Loss Percentage = 4% Now, Loss Percentage = πΏπ‘œπ‘ π‘ /(πΆπ‘œπ‘ π‘‘ π‘ƒπ‘Ÿπ‘–π‘π‘’) Γ— 100 4 = πΏπ‘œπ‘ π‘ /8000 Γ— 100 (4 Γ— 8000)/100 = Loss 4 Γ— 80 = Loss 320 = Loss ∴ Loss = 320 Selling Price of TV Cost Price = 8000 Profit Percentage = 8% Now, Profit Percentage = π‘ƒπ‘Ÿπ‘œπ‘“π‘–π‘‘/(πΆπ‘œπ‘ π‘‘ π‘ƒπ‘Ÿπ‘–π‘π‘’) Γ— 100 8 = π‘ƒπ‘Ÿπ‘œπ‘“π‘–π‘‘/8000 Γ— 100 (8 Γ— 8000)/100 = Profit 8 Γ— 80 = Profit 640 = Profit ∴ Profit = 640 Now, Loss = Cost Price βˆ’ Selling Price 320 = 8000 βˆ’ Selling Price Selling Price = 8000 βˆ’ 320 Selling Price = 7680 Now, Profit = Selling Price βˆ’ Cost Price 640 = Selling Price βˆ’ 8000 640 + 8000 = Selling Price 8640 = Selling Price Selling Price = 8640 Putting the values in equation (1) Total Selling Price (SP) = Selling Price of VCR + Selling Price of TV = 7680 + 8640 = 16320 Now, CP = Rs 16000 SP = Rs 16320 Since SP > CP ∴ Shopkeeper made a Profit Profit = SP βˆ’ CP = 16,320 βˆ’ 16,000 = Rs 320 Now, Gain Percentage = πΊπ‘Žπ‘–π‘›/𝐢𝑃×100 = 320/16000 Γ— 100 = 32/16 = 2% ∴ The Gain Percentage is 2%

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.