SBI PO Prelims practice question
In a hospital ward of 80 patients, the combined average recovery time is 59 days. Among them, 45 patients (Group 1) have an average recovery time of 52 days. Find the average recovery time of the remaining 35 patients (Group 2).
From a SBI PO Prelims Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (D) 68 days
Total sum for all 80 patients = 80 × 59 = 4720. Sum for the known group of 45 patients = 45 × 52 = 2340. Sum for the remaining 35 patients = 4720 − 2340 = 2380. Required average = 2380 ÷ 35 = 68 days.
हिंदी में प्रश्न
एक अस्पताल के वार्ड के 80 मरीजों का संयुक्त औसत स्वस्थ होने का समय 59 दिन है। इनमें से, 45 मरीजों (समूह 1) का औसत समय 52 दिन है। शेष 35 मरीजों (समूह 2) का औसत स्वस्थ होने का समय ज्ञात कीजिए।
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सही उत्तर: (D) 68 दिन
सभी 80 मरीजों का कुल योग = 80 × 59 = 4720. ज्ञात समूह के 45 मरीजों का योग = 45 × 52 = 2340. शेष 35 मरीजों का योग = 4720 − 2340 = 2380. अभीष्ट औसत = 2380 ÷ 35 = 68 दिन.
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