Aug 15 08:00 PM PDT - 09:00 PM PDT Great GRE scors start with a strong foundation. A high-quality GRE prep course shouldn't have to be expensive. Aug 17 08:00 PM PDT - 09:00 PM PDT Take 20% off the plan of your choice, 8/11 through midnight on 8/17 Aug 21 08:00 PM PDT - 09:00 PM PDT Your resume gives the adcom a small but crucial window into who you are and how you may fit into their program. Make sure you make a stellar impression with the tips in this free guide!
|
Author |
Message |
|
TAGS:
|
|
|
Retired Moderator
Joined: 07 Jun 2014
Posts: 4804
WE: Business Development (Energy and Utilities)
Followers: 170
Kudos [?]:
2841
[0], given: 394
|
9 changes in the value of imports between consecutive [#permalink]
 10 Jan 2016, 15:49
Question Stats:
55% (01:41) correct
44% (01:42) wrong based on 70 sessions
Attachment: 
#GREpracticequestion Which of the following is closest to the average .jpg [ 58.61 KiB | Viewed 5119 times ]
Which of the following is closest to the average (arithmetic mean) of the 9 changes in the value of imports between consecutive years from 2000 to 2009 ? A $260 million B $320 million C $400 million D $480 million E $640 million Practice Questions
Question: 5
Page: 163
Difficulty: medium
_________________
Sandy
If you found this post useful, please let me know by pressing the Kudos Button
Try our free Online GRE Test
|
|
|
|
|
|
|
Retired Moderator
Joined: 07 Jun 2014
Posts: 4804
WE: Business Development (Energy and Utilities)
Followers: 170
Kudos [?]:
2841
[1]
, given: 394
|
Re: 9 changes in the value of imports between consecutive [#permalink]
10 Jan 2016, 16:16
1
This post received
KUDOS
SolutionNow the object is to find the average of 9 changes from 2000 to 2009. Which can also be defined as average change between 2000 to 2009. So in year 2000: $3.3 Billion and year 2009: $9 Billion. Average change per year = \(\frac{($9 - $3.3)}{9}\) = $640 million Approx
_________________
Sandy
If you found this post useful, please let me know by pressing the Kudos Button
Try our free Online GRE Test
|
|
|
|
|
|
Manager
Joined: 04 Apr 2020
Posts: 90
Followers: 0
Kudos [?]:
35
[1]
, given: 22
|
Re: 9 changes in the value of imports between consecutive [#permalink]
25 Apr 2020, 09:16
1
This post received
KUDOS
Hi, I was under the impression that we need to find the difference for each pair of consecutive years and then take the average of the 9 values, where does it mention that we have to only take the overall aggregate and not of each individual year difference?
|
|
|
|
|
|
Founder
Joined: 18 Apr 2015
Posts: 12670
Followers: 269
Kudos [?]:
3182
[0], given: 11688
|
Re: 9 changes in the value of imports between consecutive [#permalink]
25 Apr 2020, 09:35
Hi if you read the stem, it is pretty clear. I do not see any sort of pitfall. Regards
_________________
Need Practice? 20 Free GRE Quant Tests available for free with 20 Kudos
GRE Prep Club Members of the Month: Each member of the month will get three months free access of GRE Prep Club tests.
|
|
|
|
|
|
Manager
Joined: 04 Apr 2020
Posts: 90
Followers: 0
Kudos [?]:
35
[3]
, given: 22
|
Re: 9 changes in the value of imports between consecutive [#permalink]
25 Apr 2020, 10:58
3
This post received
KUDOS
Quote: Which of the following is closest to the average (arithmetic mean) of the 9 changes in the value of imports between consecutive years from 2000 to
2009 ? It mentions the average of the 9 changes in the imports values, so isn't the 9 differences to be taken into consideration? Then the average of these differences is asked, so we have to get the average of the differences in the import values between 2 consecutive years in the 2000 - 2009 decade period. I am sorry, I am really confused because my interpretation of the question was this and I admit, this approach is much more convoluted and time consuming, but I am having a hard time in interpreting the question to get the answer specified, for the overall aggregate of the endpoint years 2000 and 2009, and not to consider the years within the range.
|
|
|
|
|
|
Intern
Joined: 08 Apr 2020
Posts: 9
Followers: 0
Kudos [?]:
3
[1]
, given: 7
|
Re: 9 changes in the value of imports between consecutive [#permalink]
25 Apr 2020, 19:32
1
This post received
KUDOS
Zohair123 wrote: Quote: Which of the following is closest to the average (arithmetic mean) of the 9 changes in the value of imports between consecutive years from 2000 to
2009 ? It mentions the average of the 9 changes in the imports values, so isn't the 9 differences to be taken into consideration? Then the average of these differences is asked, so we have to get the average of the differences in the import values between 2 consecutive years in the 2000 - 2009 decade period. I am sorry, I am really confused because my interpretation of the question was this and I admit, this approach is much more convoluted and time consuming, but I am having a hard time in interpreting the question to get the answer specified, for the overall aggregate of the endpoint years 2000 and 2009, and not to consider the years within the range. If you average out all 9 of the changes, you also get E for the answer. In my statistics courses I was told that this can be a more accurate way of calculating but it may not always be necessary. When I approximated the changes and took the average, I got around 700 million, which is closest to E.
|
|
|
|
|
|
Senior Manager
Joined: 10 Feb 2020
Posts: 392
Followers: 1
Kudos [?]:
87
[0], given: 240
|
Re: 9 changes in the value of imports between consecutive [#permalink]
07 May 2020, 12:48
This is a consecutive years series so we can use the formula (last - first) / 2. Can someone confirm if I am right?
_________________
Ever Tried? Ever Failed? No Matter. Try Again. Fail Again. Fail Better!!
|
|
|
|
|
|
Intern
Joined: 08 Apr 2020
Posts: 9
Followers: 0
Kudos [?]:
3
[1]
, given: 7
|
Re: 9 changes in the value of imports between consecutive [#permalink]
07 May 2020, 13:23
1
This post received
KUDOS
Farina wrote: This is a consecutive years series so we can use the formula (last - first) / 2. Can someone confirm if I am right? I'm guessing that because there are 9 values between the first and last, you need to divide by 9, not 2.
|
|
|
|
|
|
Manager
Joined: 20 Jun 2019
Posts: 102
Followers: 0
Kudos [?]:
54
[1]
, given: 24
|
Re: 9 changes in the value of imports between consecutive [#permalink]
11 May 2020, 22:33
1
This post received
KUDOS
We are asked for the value closest to the average (arithmetic mean) of the 9 changes in the value of imports between consecutive years from 2000 to
2009.
This essentially means Yr 1–Yr 0 + Yr 2–Yr 1... + Yr 9–Yr 8.
Notice how all terms with the exception of Yr 0 and Yr 9 will cancel. This leaves us with 9–3.2/9 => 0.644bar*1000≈ 644 million.
Closest to this is E, 640 million.
|
|
|
|
|
|
Manager
Joined: 20 Jun 2019
Posts: 102
Followers: 0
Kudos [?]:
54
[2]
, given: 24
|
Re: 9 changes in the value of imports between consecutive [#permalink]
11 May 2020, 22:35
2
This post received
KUDOS
Farina wrote: This is a consecutive years series so we can use the formula (last - first) / 2. Can someone confirm if I am right? In a consecutive series we can use first+last/2 to get the average. This however isn't the case here since the values of the changes are not in a consecutive series.
|
|
|
|
|
|
Intern
Joined: 22 Jul 2019
Posts: 8
Followers: 0
Kudos [?]:
2
[0], given: 0
|
Re: 9 changes in the value of imports between consecutive [#permalink]
23 Jun 2020, 09:05
The wording of the question is confusing.
It appears that the test maker got us by mentioning all "9 values" but had given a concession by saying approx.
|
|
|
|
|
|
|
|
|
|
close
