The Salaries A, B, C are in the Ratio 2 : 3 : 5 GMAT Problem Solving

Question: The salaries A, B, C are in the ratio 2 : 3 : 5. If the increments of 15%, 10% and 20% are allowed respectively in their salaries, then what will be new ratio of their salaries?

  1. 3:3:10
  2. 10:11:20
  3. 23:33:60
  4. 25:39:47
  5. 7:6:13

Correct Answer: C

Solution and Explanation:
Approach Solution 1:

The problem statement states that:
Given:

  • The salaries A, B, C are in the ratio 2 : 3 : 5.
  • The increments of 15%, 10%, and 20% are allowed respectively in their salaries

Asked:

  • Find out the ratio in their salaries after the increment.

As given in the question:
A:B: C = 2:3:5
Let us assume that the salary of A is 200.
Accordingly, the salary of B will be 300.
The salary of C will be 500.

Note that the ratio of the salaries for the taken value satisfies the equation.
After the increment, the new salary of A will be
A = 200 + 15%(200)
= 200 + \(\frac{15}{100} \)*200
= 230

The new salary of B will be
B = 300 + 10%(300)
= 300 + \(\frac{10}{100} \)* 300
= 300 + 30
= 330
The new salary of C will be
C = 500 + 20%(500)
= 500 +\(\frac{1}{5} \) * 500
= 600
New ratio = A:B:C = 230 : 330 : 600 = 23:33:60
Therefore, the ratio in their salaries after the increment = 23:33:60.

Approach Solution 2:
The problem statement implies that:
Given:

  • The salaries A, B, C are in the ratio 2 : 3 : 5.
  • The increments of 15%, 10%, and 20% are allowed respectively in their salaries

Asked:

  • Find out the ratio in their salaries after the increment.

As stated in the question:
A : B : C = 2 : 3 : 5
Let the salary of A be 2*x where x is any positive number
Similarly, the salary of B = 3x
And the salary of C = 5x
Increment in the salary of A = (1.15) * 2x = 2.3x
Increment in the salary of B = (1.10) * 3x = 3.3x
Increment in the salary of A = (1.20) * 5x = 6x
The new ratio is A:B:C = 2.3x: 3.3x: 6x = 2.3 : 3.3 : 6 = 23:33:60
Therefore, the ratio in their salaries after the increment = 23:33:60.

Approach Solution 3:
The problem statement indicates that:
Given:

  • The salaries A, B, C are in the ratio 2 : 3 : 5.
  • The increments of 15%, 10%, and 20% are allowed respectively in their salaries

Asked:

  • Find out the ratio in their salaries after the increment.

As expressed in the question:
A : B : C = 2 : 3 : 5
The increments of 15%, 10%, and 20% are entitled respectively in their salaries

Therefore, the new ratio will be:

2 x 115/100 : 3 x 110/100 : 5 x 120/100
= 2 x 1.15 : 3 x 1.10 : 5 x 1.20
= 2.3 : 3.3 : 6
=23:33:60.

Therefore, the ratio in their salaries after the increment = 23:33:60.

“The salaries A, B, C are in the ratio 2 : 3 : 5”- is a topic of the GMAT Quantitative reasoning section of the GMAT exam. This topic has been taken from the book “The Official Guide for GMAT Review”. The candidates can evaluate facts and solve numerical problems by doing these GMAT Problem Solving questions. The candidates can follow GMAT Quant practice papers to get familiar with different types of questions that will enable them to improve their calculative performance.

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