UPSC Prelims 2016·CSAT·Quantitative Aptitude·Arithmetic

The average monthly income of a person in a certain family of 5 is Rs. 10,000. What will be the average monthly income of a person in the same family if the income of one person increased by Rs. 1,20,000 per year?

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Last updated 23 May 2026, 3:31 pm IST
  1. ARs. 12,000Correct
  2. BRs. 16,000
  3. CRs. 20,000
  4. DRs. 34,000

Explanation

Original monthly family income = 5 × 10,000 = 50,000 rupees. One person's income increases by 1,20,000 rupees per year, which means an additional 1,20,000 / 12 = 10,000 rupees per month for the family. New monthly family income = 50,000 + 10,000 = 60,000 rupees. New average monthly income per person = 60,000 / 5 = 12,000 rupees. Therefore, the answer is A (Rs. 12,000).
Quantitative Aptitude: The average monthly income of a person in a certain family of 5 is Rs. 10,000. What will be the average monthly income o

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