Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 08 Feb 2016, 03:28

### 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

# Between 7 A.M. and 9 A.M., on average 50 percent of the park

Author Message
TAGS:
Senior Manager
Joined: 10 Apr 2012
Posts: 276
Location: United States
Concentration: Technology, Other
GPA: 2.44
WE: Project Management (Telecommunications)
Followers: 3

Kudos [?]: 418 [2] , given: 325

Between 7 A.M. and 9 A.M., on average 50 percent of the park [#permalink]  18 Aug 2013, 06:41
2
KUDOS
00:00

Difficulty:

45% (medium)

Question Stats:

62% (02:32) correct 38% (01:34) wrong based on 124 sessions
Between 7 A.M. and 9 A.M., on average 50 percent of the parking spaces at a parking lot near Stoneville International Airport were occupied. During these two hours approximately 8 cars were parked in the parking lot every 5 minutes. Between 9 A.M. and 11 A.M. of the same day, on average 70 percent of the parking spaces of the same parking lot were occupied, even though only 6 cars were parked every 5 minutes.

Which of the following, if true, helps to resolve the apparent discrepancy above?
(A)Fewer cars have left the parking lot between 9 A.M. and 11 A.M. than between 7A.M. and 9 A.M.
(B)Between 9 A.M. and 11 A.M., a parking lot at a mall situated near the airport, was filled, and some people who came to the mall had to park their cars at the parking lot near the Stoneville International Airport.
(C)Fewer planes departed from Stoneville International Airport between 9 A.M. and 11 A.M. than between 7 A.M. and 9 A.M.
(D)The number of large cars parked at the parking lot near Stoneville International Airport between 9 A.M. and 11 A.M. was greater than between 7 A.M. and 9 A.M.
(E)Some of the cars that were parked before 7 A.M. left the parking lot only after 11 A.M.
[Reveal] Spoiler: OA

Last edited by guerrero25 on 18 Aug 2013, 09:03, edited 1 time in total.
Director
Joined: 14 Dec 2012
Posts: 842
Location: India
Concentration: General Management, Operations
GMAT 1: 700 Q50 V34
GPA: 3.6
Followers: 48

Kudos [?]: 917 [1] , given: 197

Re: Between 7 A.M. and 9 A.M., on average 50 percent of the park [#permalink]  18 Aug 2013, 07:27
1
KUDOS
guerrero25 wrote:
Between 7 A.M. and 9 A.M., on average 50 percent of the parking spaces at a parking lot near Stoneville International Airport were occupied. During these two hours approximately 8 cars were parked in the parking lot every 5 minutes. Between 9 A.M. and 11 A.M. of the same day, on average 70 percent of the parking spaces of the same parking lot were occupied, even though only 6 cars were parked every 5 minutes.

Which of the following, if true, helps to resolve the apparent discrepancy above?
(A)Fewer cars have left the parking lot between 9 A.M. and 11 A.M. than between 7A.M. and 9 A.M.
(B)Between 9 A.M. and 11 A.M., a parking lot at a mall situated near the airport, was filled, and some people who came to the mall had to park their cars at the parking lot near the Stoneville International Airport.
(C)Fewer planes departed from Stoneville International Airport between 9 A.M. and 11 A.M. than between 7 A.M. and 9 A.M.
(D)The number of large cars parked at the parking lot near Stoneville International Airport between 9 A.M. and 11 A.M. was greater than between 7 A.M. and 9 A.M.
(E)Some of the cars that were parked before 7 A.M. left the parking lot only after 11 A.M.

IMO A

Let say parking lot has $$20$$ space for parking

between 7 - 9
average occupancy = 50% = 10 places are full
every 5 mins 8 cars were parked....so in order to make up to 50% 8 cars have to leave parking space.
so it means every 5 mins ==>8 cars are leaving==>so between 7 - 9 (120 mins) ==.total cars left = $$8 * \frac{120}{5} =192$$

between 9 - 11
average occupancy = 70% = 14 places are full
every 5 mins 6 cars were parked....so in order to make up to 70% 6 cars have to leave parking space.
so it means every 5 mins ==>6 cars are leaving==>so between 7 - 9(120 mins) ==.total cars left =$$6 * \frac{120}{5} =144$$

clearly,Fewer cars have left the parking lot between 9 A.M. and 11 A.M. than between 7A.M. and 9 A.M.
hence A

LETS SEE OTHER OPTIONS:

(A)Fewer cars have left the parking lot between 9 A.M. and 11 A.M. than between 7A.M. and 9 A.M.
CORRECT

(B)Between 9 A.M. and 11 A.M., a parking lot at a mall situated near the airport, was filled, and some people who came to the mall had to park their cars at the parking lot near the Stoneville International Airport.
WRONG
==STILL THE PARADOX IS NOT CLEAR WHY EVERY 5 MINUTES FEWER CARS WERE PARKED.

(C)Fewer planes departed from Stoneville International Airport between 9 A.M. and 11 A.M. than between 7 A.M. and 9 A.M.
WRONG
==OUT OF SCOPE.

(D)The number of large cars parked at the parking lot near Stoneville International Airport between 9 A.M. and 11 A.M. was greater than between 7 A.M. and 9 A.M.
WRONG
==NOW DONT THINK THAT LARGE CARS ARE GOING TO OCCUPY MORE THAN 1 SPACE OF PARKING LOT FOR EACH BIG CAR.

(E)Some of the cars that were parked before 7 A.M. left the parking lot only after 11 A.M.
WRONG
==THIS WILL BE SAME FOR BOTH TIMING SO NOT RESOLVING THE PARADOX.

HENCE A
_________________

When you want to succeed as bad as you want to breathe ...then you will be successfull....

GIVE VALUE TO OFFICIAL QUESTIONS...

learn AWA writing techniques while watching video : http://www.gmatprepnow.com/module/gmat- ... assessment

Re: Between 7 A.M. and 9 A.M., on average 50 percent of the park   [#permalink] 18 Aug 2013, 07:27
Similar topics Replies Last post
Similar
Topics:
Sometimes I am confused between Main Point and Strengthen 2 27 Apr 2012, 10:00
I am not a native speeker of English. I am a chinese. When I 2 07 Oct 2009, 10:11
I am scoring almost perfect in RC and CR, however I am 4 08 Nov 2006, 23:09
I have my GMAT next friday (7 July) I am week in CR (Esp - 7 28 Jun 2006, 13:57
i am a little skeptical about using the diagramming 0 04 Jun 2006, 08:22
Display posts from previous: Sort by