Question
CSATEasyPrelims 2016Maths

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?

Explanation

Given: Original average monthly income of the family = Rs. 10,00010,000 Number of persons in the family = 55 Income increase of one person = Rs. 1,20,0001,20,000 per year

Step-by-Step Calculation: Original total monthly income of the family: Total income = 10,000510,000 * 5 = Rs. 50,00050,000

Annual income increase for one person: Increase per month = Rs. 1,20,000/121,20,000 / 12 = Rs. 10,00010,000

New total monthly income of the family: New total income = 50,000+10,00050,000 + 10,000 = Rs. 60,00060,000

New average monthly income: New average income = 60,000/560,000 / 5 = Rs. 12,00012,000

Answer: A (Rs. 12,00012,000)

Maths PYQs from 2016

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