Question

The average monthly income of p and q is $5050. The average monthly income of q and r is $6250 and the average monthly income of p and r is $5200. What is ps income?

Answer 1

let income of p be P

let income of q be Q

let income of r be R

P+Q=10010 ----(1)

Q+R=12500 ---(2)

R+P=10400 ----(3)

(2)-(1)

R-P=2490

R+P=10400

2P=7910 => P=3955