Question
The average weight of 9 pupils is 41 kg. When the weights of Jack and Ryan are included, the average weight becomes 46 kg. Ryan is 4 kg lighter than Jack. What is Jack's weight?
3 m

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The average weight of 9 pupils is 41 kg. When the weights of Jack and Ryan are included, the average weight becomes 46 kg. Ryan is 4 kg lighter than Jack. What is Jack's weight?