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Let the income of c = x

And income of B = x + (x × 8/100)

Also income of A= (X + 8x/100)×25/100(x+8x/100)

since A's income is 20250

20250 = (X + 8X/100)×25/100 + (X + 8X/100)

20250 = (X+ 8X/100)(25/100+1)

20250 = (108X/100)(25/100)

202500000 = 13500 X

X = 15000

Hence Income of C = 15000

Also Income of B = 1500 + 15000x8/100

B's Income = 16200