Question 1137788
The first estimation costing 5000 money units was based on {{{n-5}}} students.
The actual of students who went costing 5000+1000=<b>6000 money units, was  n students</b>.


Avg Price, first estimate
{{{5000/(n-5)}}}


Avg Price, actual students
{{{6000/n}}}



====
 the average expenses per student was decreased by -
10.
====


Not sure why the dash done like that; not clear if it meant as negative sign.  Assuming not.


{{{5000/(n-5)-6000/n=10}}}

-

{{{n^2+95n-3000=0}}}

.
.

{{{n=(-95+sqrt(95^2+4*3000))/2}}}


{{{highlight(n=25)}}}