Mathematics · Averages
In a class, there are (x + 10) students whose average weight is 40 kg. If y more students with an average weight of 48 kg are added, the average weight of the class increases by 2 kg. Instead, if (y + 5) students with an average weight of 44 kg are added, the average weight of the class increases by 1.6 kg. Find the value of 2(x + y).
- 128
- 210
- 324
- 420✓
Correct answer
20
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