Three persons A, B, and C donate 10% , 7%, and 9% respectively of their monthly salaries to a charitable trust. The monthly salaries of A and B are equal and the difference in the donatation of A and B is Rs 900. If the total donation by A and B is Rs 600 more than of C, then what is the monthly salary (in Rs) of C?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 50000
Let the monthly salary of A, B and C be 100x, 100x, 100y.
Donation by A = 10% of 100x = 10x.
Donation by B = 7% of 100x = 7x
Donation by C = 9% of 100y = 9y.
10x - 7x = 900
3x = 900
x = 300
Total donation of A and B is 600 more than C.
10x + 7x = 9y + 600
17 × 300 = 9y + 600
9y = 5100 - 600
9y = 4500
y = 500.
Monthly salary of C = 100y
= 100 × 500 = 50000.