RRB NTPC CBT-1 previous year question
If the mean proportional between x and 36 is 12, find x.
Asked in RRB NTPC 2026 — 18 June Shift 2 · Quantitative Aptitude
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Correct answer: (C) 4
The mean proportional between x and 36 being 12 means 122 = x x 36, so 144 = 36x, giving x = 4.
हिंदी में प्रश्न
यदि x और 36 के बीच मध्यानुपाती 12 है, तो x का मान ज्ञात कीजिए।
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सही उत्तर: (C) 7
x और 36 के बीच माध्यानुपाती 12 होने का अर्थ है 122 = x x 36, इसलिए 144 = 36x, जिससे x = 4 प्राप्त होता है।
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