The ratio of earnings to expenditure of ‘A’ is 5:3 and that of ‘B’ is 7:6. If the savings of ‘A’ is…
The ratio is 4:3. Write A's earnings and expenditure as 5x and 3x, so A saves 2x; write B's as 7y and 6y, so B saves y. Since 2x = 2y, x = y, and the combined ratio is (5x +…
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The ratio of earnings to expenditure of ‘A’ is 5:3 and that of ‘B’ is 7:6. If the savings of ‘A’ is twice that of ‘B’ then what could be the ratio of total earnings of ‘A’ and ‘B’ together to the total expenditure of ‘A’ and ‘B’.
Answer and explanation
Correct answer B
The ratio is 4:3. Write A's earnings and expenditure as 5x and 3x, so A saves 2x; write B's as 7y and 6y, so B saves y. Since 2x = 2y, x = y, and the combined ratio is (5x + 7x):(3x + 6x) = 12:9 = 4:3.
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