Civil Services Examination · Question 26
If 4 ≤ x ≤ 8 and 2 ≤ y ≤ 7, then what is the ratio of maximum value of (x + y) to minimum value of (x - y)?
Show answer & explanation
Answer: (D) None of the above
Explanation
Max (x + y) = 15 and min (x - y) = 4 - 7 = -3, so the ratio is -5, which is not listed. (Answer as per the official UPSC answer key.)