SBI Clerk Prelims practice question
The average of the ages of 16 members present at a family gathering was calculated as 36 years. It was later found that one entry had been wrongly recorded as 15 years instead of the correct value of 63 years. What is the corrected average?
From a SBI Clerk Prelims Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (A) 39 years
Wrong total = 36 × 16 = 576 years.
Correct total = 576 − 15 + 63 = 624 years.
Corrected average = 624 ÷ 16 = 39 years.
हिंदी में प्रश्न
एक पारिवारिक समारोह में उपस्थित 16 सदस्यों की आयु का औसत 36 वर्ष निकाला गया। बाद में पता चला कि एक प्रविष्टि गलती से 15 वर्ष दर्ज कर दी गई थी, जबकि सही मान 63 वर्ष था। संशोधित (सही) औसत ज्ञात कीजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (A) 39 वर्ष
गलत कुल योग = 36 × 16 = 576 वर्ष।
सही कुल योग = 576 − 15 + 63 = 624 वर्ष।
संशोधित औसत = 624 ÷ 16 = 39 वर्ष।
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