Question

A and B have monthly incomes in the ratio 5 : 6 and monthly expenditures in the ratio 3 : 4. If they save ₹ 1800 and ₹ 1600 respectively, find the monthly income of B:

विकल्प

• ₹ 3400

• ₹ 2700

• ₹ 1720

• ₹ 7200

Answer 1

₹ 7200

Explanation:

Given `"Monthly income of A"/"Monthly income of B" = 5/6`

∴ Monthly income of A = 5x and that of B = 6x (x is a constant)

According to the question

`(5"x" - 1800)/(6"x" - 1600) = 3/4`

20x − 7200 = 18x − 4800

2x = 2400

∴ x = 2400

∴ Monthly income of B = 1200 × 6 = ₹ 7200