Question 1001392


{{{student/teacher =30 / 2}}} 

If there are {{{170}}} teachers, then we have

{{{student/170 =30 / 2}}} 

{{{student/170 =15}}} 

{{{student =15*170}}} 

{{{student =2550}}} 

check the ratio:

{{{2550/170 =30 / 2}}} 

{{{255/17 =15}}} 

{{{15 =15}}}