Mean weight of m boys is $43$ kg. If the teacher who weighs $63$kg is included the mean becomes $45$ kg. What is the value of $m$?
2026-03-25 19:05:32.1774465532
Mean weight of $m$ boys; find $m$
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Solve for $\sum{x_i}$ and $m$:
$\sum{x_i}/m=43$ and $(\sum{x_i} +63)/(m+1)=45$