RRB NTPC CBT-1 previous year question
A shopkeeper sells two types of pens, A and B. The total number of pens sold in a day is 120. The price of pen A is ₹12 each and pen B is ₹8 each. If the total sale amount is ₹1120, how many pens of type A did he sell?
Asked in RRB NTPC 2026 — 14 June Shift 2 · Quantitative Aptitude
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Correct answer: (A) 40
Let a pens of type A be sold; then 12a+8(120-a)=1120, giving 4a+960=1120, so a=40 pens.
हिंदी में प्रश्न
एक दुकानदार दो प्रकार के पेन, A और 120 बेचता है। किसी दिन बेचे गए पेन की कुल संख्या 420 है। पेन At कीमत ₹12 प्रति पेन है और पैन ₹8 की कीमत ₹1120 प्रति पेन है। यदि कुल बिक्री राशि ₹4420 है, तो उसने A प्रकार के कितने पैन बेचे?
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उत्तर और व्याख्या देखें
सही उत्तर: (A) 50
मान लें कि a पेन प्रकार A के बेचे गए; तब 12a+8(120-a)=1120, जिससे 4a+960=1120, अतः a=40 पेन प्राप्त होते हैं।
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