<PRE><B>Question 1182123</B>
.
&lt;pre&gt;

The total of the 43 students is  43*87.8  scores.


The total of the 9 students is  9*77  scores.


The grand total is  43*87.8 + 9*77.



The mean score for the entire class of 43 + 9 students is


    {{{(43*87.8 + 9*77)/(43+9)}}} = 85.9   (rounded)      &lt;U&gt;ANSWER&lt;/U&gt;
&lt;/pre&gt;

Solved.


---------------


To see many other similar solved problems, &amp;nbsp;look into the lessons

&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF=https://www.algebra.com/algebra/homework/Average/Solved-problems-on-average-scores-weight-height-and-temperature.lesson&gt;Solved problems on average scores, weight, height and temperature&lt;/A&gt;

&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF=https://www.algebra.com/algebra/homework/Average/Solved-problems-on-average-scores.lesson&gt;Solved problems on average scores&lt;/A&gt;

&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF=https://www.algebra.com/algebra/homework/Average/Solved-problems-on-average-age.lesson&gt;Solved problems on average age&lt;/A&gt; 

&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;- &lt;A HREF=https://www.algebra.com/algebra/homework/Average/Miscellaneous-problems-on-average-values.lesson&gt;Miscellaneous problems on average values&lt;/A&gt; 

in this site.


Consider these lessons as your textbook, &amp;nbsp;handbook, &amp;nbsp;tutorials and &amp;nbsp;(free of charge) &amp;nbsp;home teacher.



</PRE>