10 year ago, the average age of 10 people was 33. After 3 yeras a person of 40 died. After another 3 year person of 40 year died. After another 3 year another person died. Find the present average age?

• 10 yrs ago total age=(avg age *no of ppl) tat time
  i.e 33*10=330
  now toal age = 43*10=430
  after 3 years total age = (430+10*3) -40=(390-40)=420 {9 ppl lest now}
  after another 3 years = (420+9*3)-40 =407 { 8 ppl left now}
  another 3 years later =(407+8*3)-40=391 {7 ppl left now}
  now avg age= (391/7)
  =55.8
• 9 years agoHelpfull: Yes(11) No(5)
• total avg age= 10*33 =330
  after 3 yrs a person aged 40 died = 40-3 = 37
  after 3 yrs a person aged 40 died(3+3=6yrs) = 40-6 =34
  after 3 yrs a person aged 30 died(3+3+3=9yrs) = 30-9 =21
  
  = 330 - (37+34+21) = 330 - 92 =238
  presently 7 person alive and 3 died and out present avg is 238, therefore = 238/7 = 34
  10 years ago therefore, 34+10 =44years
  
  Solved By Face Solution
• 9 years agoHelpfull: Yes(9) No(0)
• 10 year ago total age=330 of 10 people
  7 year ago total age=330+10*3=360
  but now one people die of 40 year,so 360-40=320(now 9 people remain)
  after 3 year total age=320+9*3=347
  but now one more people die of 40 year,so 347-40=307(now 8 people remain)
  after another 3 years total=307+3*8=331
  but now one more people die of 40 year,so 331-40=291(now 7 people remain)
  after 1 year total age=291+7*1=298
  average of age of 7 people=298/7= 42.5
  
  
• 9 years agoHelpfull: Yes(5) No(1)
• 41.5 yrs
  total age=330
  aftr 3 yrs=330+(10*3)=360-40=320
  aftr 3 yrs= 320+(9*3)=347-40=307
  aftr 3 yrs=307+(8*3)=331-40=291
  remaining 7 persons left and also 1 more yr left.. for 7persons there will be 7 yrs(1 yr which is left)
  291+7=298
  avg=298/7=42.5
  
  
• 9 years agoHelpfull: Yes(5) No(1)
• 42.5 years ?
• 9 years agoHelpfull: Yes(3) No(1)
• sum of present ages of 10 people = 330+10*10 =430
  now remove the people who were died = 430 - ( 40+ 10-3 ) - ( 40+10-6 ) -( 40+10-9 )
  i.e = 298
  present avg = 298/7 = 42.571
• 9 years agoHelpfull: Yes(3) No(2)
• 3rd time the age of the person who died is not mentioned so it cannot be answered
• 9 years agoHelpfull: Yes(1) No(3)
• here in this question in the last previous line it will be mentioned that "After another 3 year another person of 40 year died".
  10 year ago,the average age of 10 people was 33.
  So,10 year ago the summation of age of 10 people was (33*10)=330
  After 3 years a person of 40 died
  So now the total age of 9 people will be (330-40)=290
  After another three years person of 40 year died
  So now the total age of 8 people will be (290-40)=250
  Again,After another three years person of 40 year died
  So now the total age of 7 people will be (250-40)=210
  So,present average age=(210/7)=30 (ans)
• 9 years agoHelpfull: Yes(1) No(2)
• 30 years?
• 9 years agoHelpfull: Yes(0) No(2)
• 35.2 years?
• 9 years agoHelpfull: Yes(0) No(1)
• 32 years is the answer..
• 9 years agoHelpfull: Yes(0) No(1)
• 31 years is the answer
• 9 years agoHelpfull: Yes(0) No(1)
• age 10 year ago 330
  9th 331
  8th 332
  7th 333 but a person age 40 died so 333-40=293; avrg=293/9=32.5
  6th 294
  5th295
  4th296 again 40 yr man died 296-40=256 no of person=8
  3ed257
  2nd258
  1st259 agin one died 259-40=219 no of person=7
  avrg=219/7=31.28
  31.28??
• 9 years agoHelpfull: Yes(0) No(2)
• 34
  becaz present avg age=37+34+31/3
• 9 years agoHelpfull: Yes(0) No(1)