Aptitude - Average - Discussion
Discussion Forum : Average - General Questions (Q.No. 2)
2.
A family consists of two grandparents, two parents and three grandchildren. The average age of the grandparents is 67 years, that of the parents is 35 years and that of the grandchildren is 6 years. What is the average age of the family?
Answer: Option
Explanation:
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Video Explanation: https://youtu.be/OXLnoItd0MA
Discussion:
70 comments Page 5 of 7.
Krishna said:
1 decade ago
@Eric: The numbers are not equal, grandparents are 2, parents are also 2 but children are 3. so don't take avg figure.
Grand parents avg age of 2 = 67, but 2 people are there so 67*2.
Parents avg age of 2 = 35, 2 people are two so 35+35 or 35*2.
Children are 3 avg age = 6, people are three so 6+6+6 or 6*3.
If in the question if he said children also two then you can take avg directly.
Grand parents avg age of 2 = 67, but 2 people are there so 67*2.
Parents avg age of 2 = 35, 2 people are two so 35+35 or 35*2.
Children are 3 avg age = 6, people are three so 6+6+6 or 6*3.
If in the question if he said children also two then you can take avg directly.
H.R said:
1 decade ago
They are mention three grandchildren observe the problem again.
Naina said:
1 decade ago
Exactly no.of children is not given then how 3 is taken?
Iqra said:
1 decade ago
Numbers of children is not mentioned here?
Nilin said:
1 decade ago
But I wanted to know how it comes from 222/7 to 31 5/7?
Rupinderjit said:
1 decade ago
(grandpa+granny)/2=67=134
(ma+pa)/2=35=70
(rinku+minku+chinku)/3=6=18
Now average age is(total age of all members/no of members) = 222/7(grandpa,granny,ma,pa,chinku,minku,rinku)
Hope it'll help you
(ma+pa)/2=35=70
(rinku+minku+chinku)/3=6=18
Now average age is(total age of all members/no of members) = 222/7(grandpa,granny,ma,pa,chinku,minku,rinku)
Hope it'll help you
Ankur Mishra said:
1 decade ago
As you are mentioning in question that 2 grandparents are there means 4 peoples (Because grandparent consists of 2 Members)and same as in parents 2 parents means 4 person again. Then i hope here total members are 11.
Hope it is correct if not please correct me
Hope it is correct if not please correct me
Sarath said:
1 decade ago
Thank you swathi.
Swati said:
1 decade ago
There are 2 grandparents of 67yrs (67*2)
2 parents of 35yrs (35*2)
3 grandchildren of 6yrs (6*3)
average = sum of total ages/no.of persons
67 x 2 + 35 x 2 + 6 x 3 divided by 2 + 2 + 3
=31 5/7
Hope that explains if not plz correct me.
2 parents of 35yrs (35*2)
3 grandchildren of 6yrs (6*3)
average = sum of total ages/no.of persons
67 x 2 + 35 x 2 + 6 x 3 divided by 2 + 2 + 3
=31 5/7
Hope that explains if not plz correct me.
Steffi said:
1 decade ago
In the answer how 6x3 came?
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