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অনুরাগ 144 টাকায় একটি কলম বিক্রি করে ক্রয়মূল্যের(দামের) এক-সপ্তমাংশ হারায়। যদি কলমটি 189 টাকায় বিক্রি হয় তবে কত শতাংশ লাভ হয়?

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RRC Group D Previous Paper 1 (Held On: 17 Sep 2018 Shift 1)
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  1. 11%
  2. 12.5%
  3. 11.5%
  4. 14%

Answer (Detailed Solution Below)

Option 2 : 12.5%
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 ধরা যাক, ক্রয়মূল্য হ'ল x টাকা

⇒ ক্ষতি = x/7

⇒ বিক্রয়মূল্য = x – (x/7)

⇒ 144 = 6x/7

⇒ x = 168

⇒ নতুন বিক্রয়মূল্য = 189 টাকা

⇒ লাভ % = {(189 – 168)/168} × 100= 12.5%

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