If the average weight of a class of 20 students decreased by 0.25 kg when a boy weighing 48 kg was replaced by another boy weighing A kg, find the value of A.
Question
Solution 1
To find the value of A, follow these steps:
Calculate the total weight of the class before the replacement.
- Let the average weight of the class before the replacement be ( W ) kg.
- Therefore, the total weight of the class before the replacement is ( 20W ) kg.
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