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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 $m$?

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  • $\begingroup$ Yes m is a number of boys $\endgroup$ – Bhavin Nov 22 '16 at 16:24
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    $\begingroup$ This is not a 'do my homework for free' service!!! $\endgroup$ – barak manos Nov 22 '16 at 16:29
  • $\begingroup$ Where are you struggling with this question? $\endgroup$ – Kitter Catter Nov 22 '16 at 16:29
  • $\begingroup$ How further this equation is elaborate? (∑xi+63)/(m+1)=45 $\endgroup$ – Bhavin Nov 22 '16 at 16:32
  • $\begingroup$ I have solved it. Thank you for your reply. $\endgroup$ – Bhavin Nov 23 '16 at 7:21
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Solve for $\sum{x_i}$ and $m$:

$\sum{x_i}/m=43$ and $(\sum{x_i} +63)/(m+1)=45$

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  • $\begingroup$ Obviously giving $m=9$! $\endgroup$ – rbm Nov 22 '16 at 16:24
  • $\begingroup$ could you please explain more? $\endgroup$ – Bhavin Nov 22 '16 at 16:28

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