Question

The average income of a and b is 5050. Teh average monthly income of b and c is 6250. And average montly income of a and b is 5200. The monthly income of a is

Answer 1

Answer:

average monthly in come of a & b

are repeated qn is not correct

Answer 2

Answer:

let the income of a be x, b be y, c be z

average income of a and b =( x+y)/2=5050

average income of b and c= (y+z)/2=6250

average income of a and c= (x+z)/2=5200

x+y=5050*2=10100  .................. (1)

y+z=6250*2=12500....................(2)

x+z=5200*2=10400................(3)

subtract (2) from (3)

x+z-y-z=10400-12500=-2100

x-y=-2100.........................(4)

add (1) and (4)

x+y+x-y=10100-2100

2x=8000

x=4000= monthly income of a

Step-by-step explanation: