RRB NTPC CBT-1 previous year question
A shopkeeper buys two types of notebooks. The cost of 3 notebooks of the first type and 5 notebooks of the second type together is ₹420. The cost of one notebook of the second type is ₹20 more than the cost of one notebook of the first type. What is the cost of one notebook of the first type?
Asked in RRB NTPC 2026 — 16 June Shift 3 · Quantitative Aptitude
Tap an option to check your answer.
Show answer and explanation
Correct answer: (A) ₹40
Let first-type notebook cost = x, second-type = x+20. Then 3x+5(x+20)=420 gives 8x=320, so x = ₹40.
हिंदी में प्रश्न
एक दुकानदार दो प्रकार की नोटबुक खरीदता el पहली प्रकार की 3 नोटबुक और दूसरी प्रकार की 5 नोटबुक को कुल कीमत ₹420 Fl दूसरी प्रकार को एक नोटबुक को कीमत, पहली प्रकार की एक नोटबुक की कीमत से ₹20 HUH Fl पहली प्रकार की एक नोटबुक की कामत क्या है?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (A) ₹45
मान लें पहले प्रकार की नोटबुक की कीमत = x, दूसरे प्रकार की = x+20। तब 3x+5(x+20)=420 से 8x=320, अतः x = ₹40 है।
More solved Quantitative Aptitude questions
- A shopkeeper claims to sell rice at cost price, but uses a false weight and gains 25%. For 1 kg, how much rice does he actually give?
- If ₹5,000 is invested at 8% per annum compounded annually, what will be the compound interest earned after 2 years?
- A shopkeeper sells an article to A at a profit of 20%. A sells it to B at a profit of 25%. If B pays ₹3,000, what is the cost price of the…
- Three friends, Amit, Bala, and Chetan, have savings in the ratio 5:7:9. If Bala's savings exceed Amit's by ₹3,600, what are Chetan's total…
- The sum of two positive numbers is 44 and their product is 228. The positive difference between them is:
- The average of five numbers is 24. If four of the numbers are 18, 20, 25 and 27, what is the fifth number?