Out of 10 teachers of a school, one teacher retires and in his place, a new teacher of age 25 years joins .As a result , average age of teachers is reduced by 3 years . The age (in years) of the retired teacher is

• 55 yrs
  
  If earlier average was x yrs and age of retired teacher is y, then
  10x-y+25 = 10*(x-3)
  y=55 yrs
• 11 years agoHelpfull: Yes(7) No(2)
• Age of retired teacher =
  25+(10×3)=25+30=55 years
• 5 years agoHelpfull: Yes(0) No(0)