It is currently 18 Feb 2018, 17:58

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Before the regime change, the National Museum regularly displayed only

Author Message
TAGS:

Hide Tags

Manager
Joined: 23 Jan 2011
Posts: 126
Before the regime change, the National Museum regularly displayed only [#permalink]

Show Tags

17 Jul 2011, 13:07
4
This post was
BOOKMARKED
00:00

Difficulty:

55% (hard)

Question Stats:

72% (02:51) correct 28% (03:23) wrong based on 36 sessions

HideShow timer Statistics

Before the regime change, the National Museum regularly displayed only one third of the artifacts in its collection; the other two thirds were kept in storage. The National Museum’s curator estimates that one seventh to one fifth of the artifacts in the museum’s collection disappeared during the regime change. If the National Museum now wishes to display the same number of artifacts as it did before the regime change, and if none of the missing artifacts are recovered, then the museum will keep in storage:

1) $$4/5$$ to $$6/7$$ of artifacts in collection

2) $$9/14$$ to $$13/20$$

3) $$3/5$$ to $$5/7$$

4) $$7/12$$ to $$11/18$$

5) $$7/18$$ to $$5/12$$
[Reveal] Spoiler: OA
Manager
Joined: 23 Jan 2011
Posts: 126
Re: Before the regime change, the National Museum regularly displayed only [#permalink]

Show Tags

17 Jul 2011, 13:14
I do not think that OA is spot on. Here's why it could be.

Total no of artifacts= 105 (3*5*7)

Stolen= 15 to 21 (1/7 to 1/5)

Remain = 84 to 90

keep in storage= 56 to 60

this equals 8/12 to 2/3. Can someone explain pls?
Math Forum Moderator
Joined: 20 Dec 2010
Posts: 1945
Re: Before the regime change, the National Museum regularly displayed only [#permalink]

Show Tags

17 Jul 2011, 13:20
Chetangupta wrote:
I do not think that OA is spot on. Here's why it could be.

Total no of artifacts= 105 (3*5*7)

Stolen= 15 to 21 (1/7 to 1/5)

Remain = 84 to 90

keep in storage= 56 to 60

this equals 8/12 to 2/3. Can someone explain pls?

84 -> 90 is correct.

Requirement is: Museum wants to display the number of artifacts that it did before. Before, it displayed 35 i.e. 1/3*105

Now too:
35

If 21 were stolen
84-35=49
49/84-> store

If 15 stolen:
Total=90
Display=35
Store=90-35=55
55/90->Store
_________________
Manager
Joined: 23 Jan 2011
Posts: 126
Re: Before the regime change, the National Museum regularly displayed only [#permalink]

Show Tags

17 Jul 2011, 13:22
fluke wrote:
Chetangupta wrote:
I do not think that OA is spot on. Here's why it could be.

Total no of artifacts= 105 (3*5*7)

Stolen= 15 to 21 (1/7 to 1/5)

Remain = 84 to 90

keep in storage= 56 to 60

this equals 8/12 to 2/3. Can someone explain pls?

84 -> 90 is correct.

Requirement is: Museum wants to display the number of artifacts that it did before. Before, it displayed 35 i.e. 1/3*105

Now too:
35

If 21 were stolen
84-35=49
49/84-> store

If 15 stolen:
Total=90
Display=35
Store=90-35=55
55/90->Store

Yup, totally missed out that part.
Director
Joined: 01 Feb 2011
Posts: 703
Re: Before the regime change, the National Museum regularly displayed only [#permalink]

Show Tags

17 Jul 2011, 13:41
1
KUDOS
let T be total number of artifacts initially.

stolen (1/7)T to (1/5)T

left (6/7)T to (4/5)T = new total

1/3 for display T/3

storage (6/7)T -T/3 to (4/5)- T/3

11/21 T to 7T/15

so storage to new total = (11T/21) / (6T/7) to (7T/15) / (4T/5)

i.e 11/18 to 7/12

Veritas Prep GMAT Instructor
Joined: 16 Oct 2010
Posts: 7934
Location: Pune, India
Re: Before the regime change, the National Museum regularly displayed only [#permalink]

Show Tags

03 Oct 2017, 08:29
1
KUDOS
Expert's post
Chetangupta wrote:
Before the regime change, the National Museum regularly displayed only one third of the artifacts in its collection; the other two thirds were kept in storage. The National Museum’s curator estimates that one seventh to one fifth of the artifacts in the museum’s collection disappeared during the regime change. If the National Museum now wishes to display the same number of artifacts as it did before the regime change, and if none of the missing artifacts are recovered, then the museum will keep in storage:

1) $$4/5$$ to $$6/7$$ of artifacts in collection

2) $$9/14$$ to $$13/20$$

3) $$3/5$$ to $$5/7$$

4) $$7/12$$ to $$11/18$$

5) $$7/18$$ to $$5/12$$

Since everything is in fraction terms, assume a total number of artifacts, say 210 (an easy multiple of 3, 7 and 5)

Regularly displayed = (1/3)*210 = 70
Kept in storage = 140

Disappeared artefacts = 1/7th to 1/5th = 30 to 42

So number of artefacts in storage now are 110 to 98

So museum will keep in its storage 110/180 to 98/168 of its collection.

We have only one option with 11/18 hence that must be the answer.

_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Get started with Veritas Prep GMAT On Demand for \$199

Veritas Prep Reviews

Re: Before the regime change, the National Museum regularly displayed only   [#permalink] 03 Oct 2017, 08:29
Display posts from previous: Sort by