CAT 2022 Slot 2 QA Q5 Ratio, Mixtures & Averages

Question 5 of the Quantitative Ability (QA) section, CAT 2022 Slot 2, with CAT's official answer and a worked solution.

Manu earns ₹4000 per month and wants to save an average of ₹550 per month in a year. In the first nine months, his monthly expense was ₹3500, and he foresees that, tenth month onward, his monthly expense will increase to ₹3700. In order to meet his yearly savings target, his monthly earnings, in rupees, from the tenth month onward should be
  1. A
    4200
  2. B
    4400
  3. C
    4300
  4. D
    4350

Answer: (B) 4400 Ratio, Mixtures & Averages MCQ

Solution

  1. Yearly target \(=550\times12=6600\). First nine months save \(9\times500=4500\).
  2. The last three months must save 2100, i.e. 700 a month.
  3. Earnings \(=3700+700=4400\).