The average weight of a class of 20 stud...

The average weight of a class of 20 students is 45 kgs. A new student whose weight is 40 kgs replaces an old student of this class. Hence, the average weight of the whole class decreases by 1 kg. The weight of the replaced student is :

55 kgs

50 kgs

60 kgs

none of these

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ARIHANT SSC-AVERAGES-Exercise (Level 1)

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