Question

average income of A , B, C is 3200, average income of B,C,D is 3700, average income of A, C,D is 4000, average income of A,B,D is 4200, find the income of A

Answer 1

a+b+c=3200

b+c+d=3700

a+c+d=4000

a+b+d=4200

1.b+c=3200-a=3700-d

2.₹+₹_+"(

Answer 2

Answer:

a+b+c=3200

b+c+d=3700

a+c+d=4000

a+b+d=4200

1.b+c=3200-a=3700-d

2.₹+₹_+"(