Answers

2014-12-23T21:06:57+05:30
No. of seats x
  let no. of student be y
ATQ   x=y-9                     ----(1)
and     y/2=x-7 ⇒y=2x-14  ----(2)
Substituting value of y in (1)
We have x=2x-14-9
that gives x=23
0
Mark as the best please................