Question

The average monthly income of A and B is Rs. 5000. The average monthly income of B and C is Rs. 6250 and the average monthly income of A and C is Rs. 5250. What is the monthly income of A?

• A. 5250
• B. 4250
• C. 4500
• D. 5000
• E. 4000

Answer 1

The correct option is E

4000

Let, the income of A, B, C and D respectively are a, b, c and d.

$\Rightarrow$a+b+a+c-(b+c)=(2$\times$5000)+(2$\times$5250)-(2$\times$6250)

$\Rightarrow$ 2a = 2(5000 + 5250 - 6250)

$\Rightarrow$ a = 4000

$\Rightarrow$ Monthly income of A = 4000