• 37.5

  • 50.5

  • 45

  • 42.5


The average of marks of 28 students in Mathematics = 50 Total marks of 28 students = 28 ├Ч 50 = 1400 When 8 students left , The average of marks of 20 students = 55 Total marks of 20 students = 20 ├Ч 55 = 1100 тИ┤ Total marks of 8 students = 1400 тАУ 1100 = 300 тИ┤ Average = 300 ├╖ 8 = 37.5

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