the avg age of group of 14 persons is 27 years and 9 months.two persons each 42 years old left the group.what wil be new avg .

• 25.375
  New avg.=(Total age of 14 person-age of two person of 42 each)/12
  =(14*27.75-2*42)/12=(388.5-84)/12=304.5/12= 25.375
• 10 years agoHelpfull: Yes(6) No(0)
• average age of 14 persons = 27 years 9 months = 27.9
  so the total age of 14 persons = (27.9)*14 = 390.6
  i.e, a+b+c+d+....+l+m+n = 390.6
  a+b+c+d+....+l+42+42 = 390.6
  a+b+c+d+....+l = 390.6-84
  a+b+c+d+....+l = 306.6
  so here we can say that
  
  the total age of 12 persons = 306.6
  so the average age = (306.6/12)
  the average age = 25.55
  so the new average is 29 years and 7 months
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