A and B have monthly incomes in the ratio 5:6 and monthly expenditures in the ratio 3:4. If they save Rs. 1800 and Rs. 1600 respectively, find the monthly income of B	Choose the correct choice from the following choices.
A) Rs. 3400  B) Rs. 2700  C) Rs. 1720  D) Rs. 7200  E) Rs. 8200
Explanation:   Incomes of A and B=5x and 6x and expenses of A and B = 3y and 4y   Then, savings of A = 5x-3y = 1800—?(1)   Savings of B = 6x-4y = 1600—?(2)   By solving equations (1) and (2)   y = 1400   Monthly income of B = Expenses of B + savings of B   = 4y+1600 = 4(1400) + 1600 = Rs. 7200   Answer: Rs. 7200
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A and B have monthly incomes in the ratio 5:6 and monthly expenditures in the ratio 3:4. If they save Rs. 1800 and Rs. 1600 respectively, find the monthly income of B