Question
A fraction becomes 4 when 1 is added to both the numerator and denominator and it becomes 7 when 1 is subtracted from both the numerator and denominator. The numerator of the given fraction is:
Answer: Option D
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required fraction be x/y
=> (x+1)/(y+1) = 4
=> x “ 4y = 3
(x- 1)/(y- 1) = 7
=> x “ 7 y = -6
X = 15, y = 3
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