कुल 324 नोट जिसमें 20 रुपये और 50 रुपये मूल्य के कुल 12450 रुपये हैं। 20 रुपये के नोटों की संख्या है:

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NIMCET 2020 Official Paper
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  1. 200
  2. 144
  3. 125
  4. 110

Answer (Detailed Solution Below)

Option 3 : 125
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दिया है:

20 रुपये और 50 रुपये के कुल नोट = 324

कुल योग = 12450 रुपये 

सिद्धांत:

नोटों का मूल्य × कुल नोटों की संख्या = कुल धनराशि

गणना:

माना 20 रुपये के नोटों की संख्या x है।

50 रुपये के नोटों की संख्या= 324 – x

⇒ 20 × x + 50 × (324 – x) = 12450 

⇒ 20x + 16200 – 50x = 12450

⇒ -30x = 12450 – 16200

⇒ 30x = 3750

⇒ x = 125

∴ 20 रुपये के नोटों की संख्या 125 है।

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