IBPS PO Prelims practice question
Unit 1 has 12 members with an average performance rating of 58, Unit 2 has 18 members with an average of 72, and Unit 3 has 10 members with an average of 92. Find the combined average performance rating of all members across the three groups.
From a IBPS PO Prelims Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (B) 72.8
Combined average = (n1×m1 + n2×m2 + n3×m3)/(n1+n2+n3) = (12×58 + 18×72 + 10×92)/(12+18+10) = (696 + 1296 + 920)/40 = 2912/40 = 72.8.
हिंदी में प्रश्न
यूनिट 1 में 12 सदस्य हैं जिनका औसत प्रदर्शन रेटिंग 58 है, यूनिट 2 में 18 सदस्य हैं जिनका औसत 72 है, और यूनिट 3 में 10 सदस्य हैं जिनका औसत 92 है। तीनों समूहों के सभी सदस्यों का संयुक्त औसत प्रदर्शन रेटिंग ज्ञात कीजिए।
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सही उत्तर: (B) 72.8
संयुक्त औसत = (n1×m1 + n2×m2 + n3×m3)/(n1+n2+n3) = (12×58 + 18×72 + 10×92)/(12+18+10) = (696 + 1296 + 920)/40 = 2912/40 = 72.8।
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