Question
The average weight of 5 students in a class is 25.8kg.
When a new student joins them, the average weight increases by 3.9kg. Then what will be the approximate weight of the new student?Solution
ATQ, we can say that  Weight of new student =  6(25.8 + 3.9) - 5 x 25.8  6 x 29.7 - 129  178.2 - 129  Hence, the required weight for new student is 49.2kg or 49 kg ans.
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