Question

The average monthly income of a & b is rs.5050, the average monthly income of b & c is rs.6250 and the average monthly income of c & a is 5200. find the monthly income of a

Answer 1

let the monthly income of
a = a
b = b
c = c
(a+b)= 10100
b+c = 12500
c = 12500-b
c+a = 10400
12500 - b + a = 10400
a-b = -2100
a+b = 10100
2a = 8000
a = 4000
monthly income of a is rs. 4000