. In a class the average age is 16yrs.if the teacher who is 40 yrs of age is also included ,the average
becomes
17yrs,how many students were there?

• Let the total No. of students in the class be x
  Thus,Total age of all the students taken together is 16x
  When the teacher is included, No. of persons=x+1
  Now, the equation is 17x+17=16x+40
  Solving, x=23
• 12 years agoHelpfull: Yes(23) No(1)
• TOTAL= 16X
  
  TOTAL +40 = 17(X+1)
  16X +40 = 17(X+1)
  X= 23.Ans.
• 12 years agoHelpfull: Yes(12) No(1)
• let be the no of student=x
  avg of x student =16,total age=16x
  if a teacher age included then 16x + 40
  so 16x+40= 17(x+1)
  x=23
• 9 years agoHelpfull: Yes(0) No(0)