The mean weight if 34 students of a school is 42 kg. If the weight of the teacher be included, the mean rises by 400 grams. Find the weight of the teacher (in kg)

• let d total no of students be x
  x/34=42 => x=1428
  nw the teacher s included
  ie.,(1428+y)/35=42+0.4(convert 400gms into kg ie.,400/1000=0.4)
  =>y=56
• 11 years agoHelpfull: Yes(3) No(0)
• total weight of all students=34*42=1428
  after inclusion of teacher =35*42.4=1484
  difference bw them=56=weight of teacher..
  
• 11 years agoHelpfull: Yes(3) No(0)
• ((42*34)+x)/35=42+0.400
  if we solve this then x=56
  weight of teacher is=56
• 11 years agoHelpfull: Yes(2) No(0)
• avg of 34 s = 42 hence total weight = 1428
  avg 35(34+teacher)=42.4 hence total weight=1484
  differnce of two=56 (age of teacher)
• 11 years agoHelpfull: Yes(1) No(0)