alleryIf (x + y) : (x - y) = 7 : 3, then x : y is
A3 : 7
B2 : 5
C7 : 3
D5 : 2
Answer & Solution
Correct answer: D. 5 : 2
Cross-multiplying gives 3x + 3y = 7x - 7y, so 4x = 10y and x : y = 5 : 2.
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