Multiple choice

Weekly incomes of two persons are in the ratio of 7 : 3 and their weekly expenses are in the ratio of 5 : 2. If each of them saves Rs.300 per week, then the weekly income of the first person is - दो व्यक्तियों की साप्ताहिक आय का अनुपात 7 : 3 है और उनके साप्ताहिक खर्चे का अनुपात 5 : 2 है । यदि उनमें से प्रत्येक 300 रू. प्रति सप्ताह बचत करता है, तो प्रथम व्यक्ति की साप्ताहिक आय क्या है?

  1. Rs. 4660

  2. Rs. 4880

  3. Rs. 5600

  4. Rs. 6300

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let incomes be 7x and 3x, expenses be 5y and 2y. Savings: 7x-5y = 300 and 3x-2y = 300. Solving: from 3x-2y=300, y = (3x-300)/2. Substituting: 7x - 5(3x-300)/2 = 300 → 14x - 15x + 1500 = 600 → -x = -900 → x = 900. First person's income = 7x = 6300.