WBCS.LIVE practice question

The ratio of the monthly incomes of two persons is 7 : 4 and their expenditures is 5 : 2. Each of them saves Rs. 2,000/- per month. Their monthly incomes

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Rs. 8000/-, Rs. 4000/-
  2. Rs. 7000/-, Rs. 4000/-
  3. Rs. 7500/-, Rs. 4500/-
  4. Rs. 5000/-, Rs. 2000/-

Correct answer and explanation

Correct answer: Rs. 7000/-, Rs. 4000/-

Explanation: āœ… Correct Answer: B. Rs. 7000/-, Rs. 4000/- šŸ“š Explanation: Let the incomes be 7x and 4x. Since they save Rs. 2,000 each, their expenditures are (7x - 2000) and (4x - 2000). Setting their ratio to 5:2 leads to the equation 2 * (7x - 2000) = 5 * (4x - 2000). Solving this gives 6x = 6000, so x = 1000. Therefore, their respective monthly incomes are Rs. 7,000 and Rs. 4,000.