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Q. The average marks obtained by 22 candidates in an examination are 45. The average marks of the first 10 candidates are 55 and those of the last eleven are 40. The number of marks obtained by the eleventh candidate is

  • (A) 45
  • (B) 0
  • (C) 50
  • (D) 47.5
  • Correct Answer - Option(B)
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Explanation by: Admin
Given that , The average marks obtained by 22 candidates in an examination = 45
The average marks of the first 10 candidates = 55 and The average marks of the last eleven = 40
∴ Marks obtained by eleventh candidate = 22 × 45 – (10 × 55 + 11 × 40)
Marks obtained by eleventh candidate = 990 – (550 + 440)
Marks obtained by eleventh candidate= 990 – 990 = 0

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