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If the expenditure of A and B in 1991 were equal and total income of A and B was Rs. 116L, what was the total expenditure of A and B in the same years ?
Rs.84L
Rs.83L
Rs.80L
Rs.40L
Explanation : For A 40 = (I – E)*100/E 40E = (I – E)100 2E = 5I – 5E 5I = 7E I = 7/5 E For B 50 = (116-I – E)*100/E E = 2(116 – I – E) E = 232 -2I – 2E 2I = 232 – 3E I = (232 – 3E)/2 7/5E = (-232 – 3E)/2 14E = 1160 – 15E 29E = 1160 E = 1160/29 = 40 2E = 80
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