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The incomes of A, B and C are in the ratio7: 9:12 and their spendings are in theratio 8:9:15. If A saves th of his in-come, then the savings of A, B and C are inthe ratio156:99:69 2) 69: 56 :993) 99: 56:69 4) 99 :69:564 |
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Answer» if u assume x and y and solving u will be annoyed. Provided 1/4 is the saving, 3/4 is the expenditure so Expenditure=3, Income = 4 first make A’s Income and Expenditure ratio parts as below A 7*8 9*7 12*7 8*7 9*7 15*7 Now make first one as 4 parts by multiplying 4 and second make 3 parts by multiplying 3 A’s Income = 7*8*4 = 224 A’s Expenditure = 8*7*3=168 Saving = 56 Now B’s Income = 9*8*4 = 288 B’s Expenditure = 9*7*3=189 Saving = 99 A’s Income = 12*8*4 = 384 B’s Expenditure = 15*7*3=315 so Saving = 69 Ratio 56:99:69. [In the last step, the L.C.M. of the denominators of each term is multiplied to each term of the ratio. And then each term is divided by the H.C.F. of numerators of each term of the ratio.] Therefore the ratio of savings(A:B:C)=56:99:69 . |
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