The ratio of the income of A and B is 7 : 8 respectively while the ratio of the income of B and C is 5 : 4. Find the difference between the incomes of A and C if the average of the income of A, B and C together is Rs. 10700.
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a:b:c=35:40:32
a+b+c =107---10700
---1:-100
diff. b/w a and c is =3----300
500
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