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The average marks of \(6\) students in a test is \(64\). All the students got different marks, one of the students obtained \(70\) marks and all other students scored \(40\) or more. The maximum…

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The average marks of 66 students in a test is 6464. All the students got different marks, one of the students obtained 7070 marks and all other students scored 4040 or more. The maximum possible difference between the second highest and the second lowest marks is
  1. 50
  2. 54
  3. 57
  4. 58

Answer and explanation

Correct answer: B - 54
Total 384. Make the two lowest 40 and 41 (second lowest 41). Remaining four sum 303 and include 70; with sorted a < b < c < d, take a=42, b=70, then c+d=191 with c < d gives c=95, d=96. Difference 95-41=54 (placing 70 elsewhere gives less).

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  • IPMAT Indore

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