The average marks in English obtained by 300 students is 45. the average marks of first 100 and last 100 students are 70 and 20 respectivelly. The average marks of the remaining 100 students is

  • 70
  • 20
  • 45
  • 50

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The average marks in English obtained by 300 students is 45. the average marks of first 100 and last
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