Avg wt of class is X kg(some number) after adding wt of the teacger avg wt of class becomes Y kg then wat is the wt of the teacher?

• i think so no such specific info given
  let number of student=n
  so-> initial wt. = nx
  as its given teacher and teachers so now Wt = (n+1)y
  Wt of teacher = (n+1)y-nx
• 12 years agoHelpfull: Yes(7) No(0)
• Let the weight of the class = w
  no of students = n
  therefore Average weight of the class, w/n = x
  or w =nx
  weight of techer let z is added, the average weight of class is y.
  i.e. (w+z)/(n+1) = y
  or w+z = ny + n
  or nx + z = ny + n
  therefore z = y(n+1) - nx
• 12 years agoHelpfull: Yes(4) No(0)
• et number of student=n
  total wt. of the students = nx
  if we count the of teacher then total Wt. = (n+1)y
  Wt of teacher = (n+1)y-nx
  
• 12 years agoHelpfull: Yes(2) No(0)
• Let no of stdnts=n
  So wt of teacher T=Y(n+1)-X(n)
• 12 years agoHelpfull: Yes(1) No(0)
• let no.of students=n
  then teacher's wt= y+n(y-x)
• 12 years agoHelpfull: Yes(1) No(0)