Question 873519
Average(71,83,83,77,x)=81
{{{(71+83+83+77+x)/5=81}}}
Add
{{{(344+x)/5=81}}}
Multiply both sides by 5
{{{344+x=405}}}
Subtract 344 from both sides
{{{x=61}}}
<h3>He would have to get a 61</h3>