The monthly salaries of A and B are the same. A, B and C donate 10%, 8% and 9% respectively, of their monthly salaries to a charitable trust. The difference between the donations of A and B is Rs 400. The total donation by A and B is Rs 900 more than that of C. What is the monthly salary of C?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. Rs 30,000
The salaries of A and B are same.
So let the salary of A , B and C be 100x , 100x and 100y.
A, B and C donate 10%, 8% and 9% of their salaries.
A's donation = 100x × 10% = 10x.
B's donation = 100x × 8% = 8x
C's donation = 100y × 9% = 9y
Required difference = 10x - 8x = 2x.
2x = 400
x = 200.
A's salary = 100x = 100 × 200 = 20000.
B's salary = 20000.
The total donation by A and B is Rs 900 more than that of C.
10x + 8x - 9y = 900
9y = 18 × 200 - 900
9y = 2700
y = 300.
Salary of C = 100y = 100 × 300 = 30000.