Question

Monthly incomes of two persons are in the ratio 5:4 and their monthly expenditures are in the ratio of 9:7. If each person saves Rs 500 per month, then what is their monthly income?
Mark for review
Rs 5000 and Rs 4000
Rs 3750 and Rs 3000
O None of the listed options
Rs. 8000 and Rs 10000​

Answer 1

Step-by-step explanation:

ANSWER

Let their monthly income be 5x,4x respectively.

Let their monthly expenditure be 9y,7y respectively.

5x−9y=500 ……….(1)

4x−7y=500 ………(2)

From (1) and (2)

5x−9y=4x−7y

y=

2

x

From (1),

5x−9×

2

x

=500

Or, x=1000

Their monthly income is 5000 and 4000 respectively.