The average monthly income of A and B is Rs. 5050. The average monthly income of B and C is Rs. 6250 and the average monthly income of A and C is Rs. 5200. What is the monthly income of A?	Choose the correct choice from the following:
A) 2000  B) 3000  C) 4000  D) 5000  E) 6000
Explanation:   Let monthly income of A = a   monthly income of B = b   monthly income of C = c   a + b = 2 × 5050 .... (Equation 1)   b + c = 2 × 6250 .... (Equation 2)   a + c = 2 × 5200 .... (Equation 3)   (Equation 1) + (Equation 3) - (Equation 2)   =&gt; a + b + a + c - (b + c) = (2 × 5050) + (2 × 5200) - (2 × 6250)   =&gt; 2a = 2(5050 + 5200 - 6250)   =&gt; a = 4000   i.e., Monthly income of A = 4000   Answer: Option 4000
<result>C</result>
The average monthly income of A and B is Rs. 5050. The average monthly income of B and C is Rs. 6250 and the average monthly income of A and C is Rs. 5200. What is the monthly income of A?