Delhi Police Constable practice question
The average age of 15 persons increases by 2.5 years when a person aged 27 years is replaced by a new person. Find the age of the new person.
From a Delhi Police Constable Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (C) 64.5 years
Increase in total age = n x increase = 15 x 2.5 = 37.5. New person's age = old age + increase in total = 27+37.5 = 64.5 years.
हिंदी में प्रश्न
जब 27 वर्ष के एक व्यक्ति को एक नए व्यक्ति से बदल दिया जाता है, तो 15 व्यक्तियों की औसत आयु 2.5 वर्ष बढ़ जाती है। नए व्यक्ति की आयु ज्ञात करें।
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सही उत्तर: (C) 64.5 years
Increase in total age = n x increase = 15 x 2.5 = 37.5. New person's age = old age + increase in total = 27+37.5 = 64.5 years.
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