RRB Group D practice question
Factory Unit 1 has 40 workers with an average daily wage of ₹380, and Unit 2 has 20 workers with an average daily wage of ₹680. Find the combined average daily wage of workers in both units.
From a RRB Group D Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (A) 480
Combined weighted mean = (n1×m1 + n2×m2)/(n1+n2) = (40×380 + 20×680)/(40+20) = (15200 + 13600)/60 = 28800/60 = 480.
हिंदी में प्रश्न
फैक्ट्री यूनिट 1 में 40 कर्मचारी हैं जिनकी औसत दैनिक मजदूरी ₹380 है, और यूनिट 2 में 20 कर्मचारी हैं जिनकी औसत दैनिक मजदूरी ₹680 है। दोनों यूनिट के कर्मचारियों की संयुक्त औसत दैनिक मजदूरी ज्ञात कीजिए।
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सही उत्तर: (A) 480
संयुक्त भारित औसत = (n1×m1 + n2×m2)/(n1+n2) = (40×380 + 20×680)/(40+20) = (15200 + 13600)/60 = 28800/60 = 480।
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