Question

Sol. (3) Income of ( A ) and ( B=₹ 6 x ) and ( ₹ 5 x ) Expenses of ( A ) and ( B=₹ 4 y ) and ( 3 y ) ( therefore 6 x-4 y=400 )
( 5 x-3 y=400 )
ii
By equation ( (i) times 3-(text { ii }) times 4 )
( Rightarrow 18 x-12 y-20 x+12 y )
( =1200-1600 )
( Rightarrow 2 x=400 Rightarrow x=200 )
( therefore ) Total income ( =6 x+5 x=11 x=₹ 2200 )

# Ex.2. The ratio of monthly incomes of A, B is 6:5 and their monthly expenditures are in the ratio 4. 3. If each of them saves 400 per month, find the sum of their monthly incomes. (1) 2300 (2) 2400 (3) 2200 (4) 2500

Solution