Latest TCS Aptitude Question SOLUTION: 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

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(#M40124103) TCS Numerical Ability question age Keep an EYE

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?

Asked In TCS ak roy (9 years ago)

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amarjeet singh cheema  (9 years ago)

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

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vigneshwaran  (8 years ago)

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

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Manish Srivastava  (9 years ago)

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

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Deepika  (8 years ago)

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

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kritika  (9 years ago)

42.5 years ?

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Golluru Lalitha  (8 years ago)

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

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prathyusha  (9 years ago)

3rd time the age of the person who died is not mentioned so it cannot be answered

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ATANU KUNDU  (9 years ago)

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)

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RAVI RITESH  (9 years ago)

30 years?

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Abhideep Saha  (9 years ago)

35.2 years?

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Sukanta Guha  (9 years ago)

32 years is the answer..

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koushikbiswas76@gmail.com  (9 years ago)

31 years is the answer

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anchal gupta  (9 years ago)

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??

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divya  (8 years ago)

34
becaz present avg age=37+34+31/3

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