kabir bought 100 articles for Rs 3000 .He sold 25 of them at a gain of 5%. At what gain % must he sell the remaining articles so as to gain 20% on the whole?
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cost price of 100 articles is ₹3000.
cost price of 25 articles is ₹750.
gain by selling 25 articles =5/100×750=₹37.50 .
total gain by selling 100 articles =20% of 3000=20/100×3000=₹600. So gain which has to be obtained by selling 75 articles=600-37.5=₹562.50. cost price of 75 articles =3000-750=₹2250.
gain%=562.50/2250×100=562.50/22.50=25%
So he needs to sell remaining articles at gain of 25%.
cost price of 25 articles is ₹750.
gain by selling 25 articles =5/100×750=₹37.50 .
total gain by selling 100 articles =20% of 3000=20/100×3000=₹600. So gain which has to be obtained by selling 75 articles=600-37.5=₹562.50. cost price of 75 articles =3000-750=₹2250.
gain%=562.50/2250×100=562.50/22.50=25%
So he needs to sell remaining articles at gain of 25%.
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17
in my notebook. you can see properly
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