सूरज 7 रुपये में 5 की दर से टॉफ़ी खरीदता है और 4 रुपये में 3 की दर से बेचता है, तब उका लाभ% या हानि% ज्ञात कीजिए।   

  1. (100/21)% हानि
  2. (100/21)% लाभ 
  3. (100/23)%  हानि
  4. (100/23)% लाभ

Answer (Detailed Solution Below)

Option 1 : (100/21)% हानि
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Detailed Solution

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दिया गया है:

सूरज 7 रुपये में 5 की दर से टॉफ़ी खरीदता है 

और वह 4 रुपये में 3 की दर से टॉफ़ी बेचता है

सूत्र:

लाभ = S.P - C.P

हानि = C.P - S.P

लाभ% = (लाभ × 100)/C.P

हानि% = (हानि × 100)/C.P

जहाँ, S.P = विक्रय मूल्य, C.P = क्रय मूल्य 

गणना:

माना टॉफ़ी की संख्या 15 है, (5, 3) का लघुत्तम समापवर्तक

⇒ 15 टॉफ़ी का क्रय मूल्य  = 15 × (7/5) = 21 रुपये

⇒ 15 टॉफ़ी का विक्रय मूल्य = 15 × (4/3) = 20 रुपये

⇒ हानि = C.P - S.P = 21 - 20

⇒ हानि = 1 रुपया

हानि% = (हानि × 100)/C.P

⇒ हानि% = (1 × 100)/21

⇒ हानि% = 100/21

∴ सूरज को (100/21)% की हानि होती है। 

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