Maths The average weight of a group of 20 boys was calculated to be 89.4 kg, later it was found that instead of 87 kg of a boy, the correct average weight was read as 78 kg.
| Q.200560: The average weight of a group of 20 boys was calculated to be 89.4 kg, later it was found that instead of 87 kg of a boy, the correct average weight was read as 78 kg. |
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