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17 January, 21:10

4. A laptop and a mobile phone were bought for 40000 and 24000 respective

shopkeeper made a profit of 8% on laptop and a loss of 12% on mobile phone to find

his gain or loss percent on the whole transaction.

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Answers (1)
  1. 18 January, 00:27
    0
    His gain is 0.5%

    Step-by-step explanation:

    * Lets explain how to solve the problem

    - The price of the laptop is 40000

    - The profit on laptop is 8%

    ∵ Profit = Cost price * percentage of the profit

    ∵ Cost price = 40000

    ∵ Percentage of the profit = 8%

    ∴ Profit = 40000 * 8/100 = 3200

    - The price of the mobile phone is 24000

    - The loss on mobile phone is 12%

    ∵ Loss = Cost price * percentage of the loss

    ∵ Cost price = 24000

    ∵ Percentage of the loss = 12%

    ∴ Loss = 24000 * 12/100 = 2880

    - Lets calculate the selling price of the laptop

    ∵ The selling price of the laptop = cost price + profit

    ∵ Cost price is 40000 and profit is 3200

    ∴ the selling price of laptop = 40000 + 3200 = 43200

    - Lets calculate the selling price of the mobile phone

    ∵ The selling price of the mobile phone = cost price - loss

    ∵ Cost price is 24000 and loss is 2880

    ∴ the selling price of mobile phone = 24000 - 2880 = 21120

    - Now lets find the total cost and the total selling prices

    ∵ The total cost = the cost of laptop + cost of mobile phone

    ∵ The cost of laptop is 40000 and the cost of mobile phone is 24000

    ∴ The total cost price = 40000 + 24000 = 64000

    ∵ The selling price of laptop is 43200 and the selling price of mobile

    phone is 21120

    ∴ The total selling price = 43200 + 21120 = 64320

    - If the selling price is greater than the cost price, then he's gain but

    If the selling price is smaller than the cost price, then he's loss

    ∵ The selling price is 64320 and the cost price is 64000

    ∴ The selling price > cost price

    ∴ He is gain

    ∵ The gain % = (gain : cost price) * 100%

    ∵ The gain = 64320 - 64000 = 320

    ∴ The gain % = (320 : 64000) * 100% = 0.5%

    * His gain is 0.5%
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