# John and Walter have their incomes in the ratio 7 : 5

John and Walter have their incomes in the ratio 7 : 5. The expenses of John, Walter and Nancy are in the ratio 9 : 7 : 4. If Nancy spends \$2800 and Walter saves \$1100, how much is John’s saving is?

A) \$2000
B) \$2100
C) \$2200
D) \$2300

Solution: There is some common element hidden in these type questions pertaining to Ratio and Proportion. If you can find that out, the rest of the solution is a cakewalk.

Let the expenses of John, Walter and Nancy be 9y, 7y and 4y respectively.
Thus, 4y = 2800
=> y = 700

Now, let the incomes of John and Walter be 7x and 5x respectively.

Equation(1)…………Income – Expense = Saving

Plugging in values for Walter,

5x – 7y = 1100
=> 5x – 7*700 = 1100
=> 5x = 1100 + 4900
=> 5x = 6000
=> x = 1200

Plugging in values for John, we get,

7x – 9y = Saving
7*120 – 9*700
=> 8400 – 6300
=> \$2100

Thus, John’s saving is \$2100

GyanOne is an educational services firm focused on premium GMAT coaching, application advisory (with a focus on ISB applications), and interview preparation for B-school admissions. GyanOne operates in the New Delhi region of India and has top global B-school alumni with a minimum score of 770 on the GMAT, as instructors. All GyanOne counsellors are professionally trained top B-school alumni with an experience of 100+ MBA applications behind them.

1. Complete GMAT RC Questions in less than 1 minute and 50 seconds

3. Take Notes Effectively

4. Collect and Interpret Facts

5. Speed up Summary Creation

6. Remember Information

7. Question the Author

9. Learn to Solve GMAT Reading Comprehension Main Idea Question

10.Learn to Solve GMAT Reading comprehension inference question

11. Learn to Solve GMAT Reading Comprehension Detail Questions

12. Learn to Organize passage in GMAT Reading Comprehension

13. Learn to Identify style/tone or attitude of the author

14. Learn to Improve GMAT Reading Comprehension Score

Mastering GMAT Critical Reasoning

After you read F1GMAT’s Mastering GMAT Critical Reasoning Guide, you will:

1) Learn to eliminate out of scope answer choices

2) Learn to spot logical fallacies

3) Learn to read questions by focusing on the holy trinity – premise, assumption, and conclusion.

4) Learn to disregard filler information

5) Complete GMAT CR Questions in less than 1 minute and 40 seconds

Get F1GMAT's Newsletters (Best in the Industry)

• Ranking Analysis
• Post-MBA Salary Trends
• Post-MBA Job Function & Industry Analysis
• Post-MBA City Review
• MBA Application Essay Tips
• School Specific Essay Tips
• GMAT Preparation Tips