RRB NTPC CBT-1 previous year question
The marked price of a machine is ₹16,000. The shopkeeper gives two successive discounts of 15% and N% to the customer. If the customer paid ₹12,240 for the machine, the value of N is:
Asked in RRB NTPC 2026 — 17 June Shift 1 · Quantitative Aptitude
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Correct answer: (C) 10%
Marked price Rs16,000; after first 15% discount, price = 16000*0.85 = Rs13,600. Since the customer paid Rs12,240, the second discount factor = 12240/13600 = 0.9, i.e. N = 10%.
हिंदी में प्रश्न
एक मशीन का अंकित मूल्य ₹16,000 है। दुकानदार ग्राहक को 15% और N% की दो क्रमिक छूट प्रदान करता है। यदि ग्राहक ने मशीन के लिए ₹12,240 का भुगतान किया, तो N का मान ज्ञात कीजिए।
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सही उत्तर: (C) 13.5%
अंकित मूल्य 16,000 रुपये है; पहली 15% छूट के बाद मूल्य = 16000*0.85 = 13,600 रुपये। ग्राहक ने 12,240 रुपये चुकाए, इसलिए दूसरी छूट = 12240/13600 = 0.9, अर्थात N = 10%।
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