average marks of 40 students is = 90 average marks of top 5 are = 97 Average marks of remaining 35 students are = ?
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if the average of 40 students is 90 that means sum of all marks is 3600
Simliarly sum of top 5 marks is 485
The marks of remaing students sum 3600-485=3115
average =sum÷no of observations = 3115÷35 =89
Simliarly sum of top 5 marks is 485
The marks of remaing students sum 3600-485=3115
average =sum÷no of observations = 3115÷35 =89
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