GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 06 Dec 2019, 21:24

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

A certain number of people wait in line at a bank until served. How ma

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 59587
A certain number of people wait in line at a bank until served. How ma  [#permalink]

Show Tags

New post 14 Nov 2019, 00:42
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

66% (01:26) correct 34% (01:10) wrong based on 38 sessions

HideShow timer Statistics

Competition Mode Question



A certain number of people wait in line at a bank until served. How many people are presently in line?

(1) If 2 more people joined the line and none of those currently waiting were served, there would be at least 10 people waiting in line.

(2) If no more people joined the line and 4 of the people currently waiting were served, there would be fewer than 5 people waiting in line.

_________________
VP
VP
avatar
D
Joined: 20 Jul 2017
Posts: 1139
Location: India
Concentration: Entrepreneurship, Marketing
WE: Education (Education)
Re: A certain number of people wait in line at a bank until served. How ma  [#permalink]

Show Tags

New post 14 Nov 2019, 01:16
1
(1) If 2 more people joined the line and none of those currently waiting were served, there would be at least 10 people waiting in line.
--> Possible Number of people currently waiting = {8, 9, 10, . . . . . . } --> Insufficient

(2) If no more people joined the line and 4 of the people currently waiting were served, there would be fewer than 5 people waiting in line
--> Possible Number of people currently waiting = {8, 7, 6, 5, 4} --> Insufficient

Combining (1) & (2),
Possible number = 8 ONLY --> Sufficient

IMO Option C
Director
Director
User avatar
V
Joined: 27 May 2012
Posts: 945
Re: A certain number of people wait in line at a bank until served. How ma  [#permalink]

Show Tags

New post 14 Nov 2019, 01:21
1
Bunuel wrote:
A certain number of people wait in line at a bank until served. How many people are presently in line?

(1) If 2 more people joined the line and none of those currently waiting were served, there would be at least 10 people waiting in line.

(2) If no more people joined the line and 4 of the people currently waiting were served, there would be fewer than 5 people waiting in line.


(1) - Tells us that the number of people in the line must be \(\geq \)8, so there could be 8 or 9 or 10 etc people in the line INSUFF.
(2)- Tells us that the number of people in the line must be \(\leq\) 8, so there could be , 8 or 7 or 6 etc people in the line INSUFF.

1+2

From (1) number of people cannot be less than 8 from (2) number of people cannot be more than 8 , hence number of people must be 8, SUFF.

Ans- C
_________________
- Stne
Senior Manager
Senior Manager
avatar
P
Joined: 07 Mar 2019
Posts: 434
Location: India
GMAT 1: 580 Q43 V27
WE: Sales (Energy and Utilities)
CAT Tests
Re: A certain number of people wait in line at a bank until served. How ma  [#permalink]

Show Tags

New post 14 Nov 2019, 02:53
A certain number of people wait in line at a bank until served. How many people are presently in line?
Let there are 'x' people presently in the line.

(1) If 2 more people joined the line and none of those currently waiting were served, there would be at least 10 people waiting in line.
Here, total people in line after 2 join them = x + 2
Sine no one was served x + 2 = 10
x = 8

SUFFICIENT.

(2) If no more people joined the line and 4 of the people currently waiting were served, there would be fewer than 5 people waiting in line.
Here, total people after 4 were served = x - 4
As per statement possibilities are:
x - 4 = 1 => x = 5
x - 4 = 2 => x = 6
x - 4 = 3 => x = 7
x - 4 = 4 => x = 8

INSUFFICIENT.

IMO Answer A.
_________________
Ephemeral Epiphany..!

GMATPREP1 590(Q48,V23) March 6, 2019
GMATPREP2 610(Q44,V29) June 10, 2019
GMATPREPSoft1 680(Q48,V35) June 26, 2019
Director
Director
avatar
P
Joined: 24 Nov 2016
Posts: 927
Location: United States
Re: A certain number of people wait in line at a bank until served. How ma  [#permalink]

Show Tags

New post 14 Nov 2019, 04:16
1
Quote:
A certain number of people wait in line at a bank until served. How many people are presently in line?

(1) If 2 more people joined the line and none of those currently waiting were served, there would be at least 10 people waiting in line.
(2) If no more people joined the line and 4 of the people currently waiting were served, there would be fewer than 5 people waiting in line.


(1) If 2 more people joined the line and none of those currently waiting were served, there would be at least 10 people waiting in line. insufic

w+2≥10, w≥8

(2) If no more people joined the line and 4 of the people currently waiting were served, there would be fewer than 5 people waiting in line. insufic

0<w-4<5, 0<w<9

(1 & 2) sufic

w≥8 and 0<w<9, w=8

Ans (C)
Senior Manager
Senior Manager
avatar
P
Joined: 01 Mar 2019
Posts: 332
Location: India
Concentration: Strategy, Social Entrepreneurship
Schools: Ross '22, ISB '20, NUS '20
GPA: 4
Reviews Badge
Re: A certain number of people wait in line at a bank until served. How ma  [#permalink]

Show Tags

New post 14 Nov 2019, 05:03
1
(1) If 2 more people joined the line and none of those currently waiting were served, there would be at least 10 people waiting in line.

Then the no.of before can be 8,9,10.......
Insufficient

(2) If no more people joined the line and 4 of the people currently waiting were served, there would be fewer than 5 people waiting in line.

So, no.of people before leaving can be 8,7,6.....

Insufficient



Combining both we get the no.of people are 8....

Sufficient

OA:C

Posted from my mobile device
GMAT Club Legend
GMAT Club Legend
User avatar
V
Joined: 18 Aug 2017
Posts: 5428
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
GMAT ToolKit User Premium Member CAT Tests
Re: A certain number of people wait in line at a bank until served. How ma  [#permalink]

Show Tags

New post 14 Nov 2019, 07:12
1
let total people in line = x
#1
If 2 more people joined the line and none of those currently waiting were served, there would be at least 10 people waiting in line.
x+2>=10
x>=8
insufficient
#2
If no more people joined the line and 4 of the people currently waiting were served, there would be fewer than 5 people waiting in line
x-4<5
x<9
insufficient
from 1&2
we can say that x=8
IMO C



A certain number of people wait in line at a bank until served. How many people are presently in line?

(1) If 2 more people joined the line and none of those currently waiting were served, there would be at least 10 people waiting in line.

(2) If no more people joined the line and 4 of the people currently waiting were served, there would be fewer than 5 people waiting in line.
Senior Manager
Senior Manager
avatar
P
Joined: 22 Feb 2018
Posts: 312
CAT Tests
Re: A certain number of people wait in line at a bank until served. How ma  [#permalink]

Show Tags

New post 14 Nov 2019, 11:14
1
A certain number of people wait in line at a bank until served. How many people are presently in line?
Total = x ?
(1) If 2 more people joined the line and none of those currently waiting were served, there would be at least 10 people waiting in line.
x+2 = 10, x = 8
x+2 = 11, x = 9, X>8 Insufficient.

(2) If no more people joined the line and 4 of the people currently waiting were served, there would be fewer than 5 people waiting in line.
X - 4 =4 , x = 8
x-4 = 3, x=7 , X<8 Insufficient.
1) + 2) x can be 8 only
Sufficient.

Imo. C
Manager
Manager
avatar
S
Joined: 31 Oct 2015
Posts: 92
GMAT ToolKit User
Re: A certain number of people wait in line at a bank until served. How ma  [#permalink]

Show Tags

New post 14 Nov 2019, 12:05
(1) If 2 more people joined the line and none of those currently waiting were served, there would be at least 10 people waiting in line.

If 2 joined, there would be 10. Therefore currently 8 are in the line. Sufficient.

(2) If no more people joined the line and 4 of the people currently waiting were served, there would be fewer than 5 people waiting in line.

fewer than 5 people could mean 4,5,6,7 and 8 are currently waiting. Insufficient.

Therefore answer is A
Intern
Intern
User avatar
B
Joined: 30 Oct 2019
Posts: 16
Location: United Kingdom
Concentration: General Management, Technology
GPA: 4
Re: A certain number of people wait in line at a bank until served. How ma  [#permalink]

Show Tags

New post 14 Nov 2019, 12:34
1
Let x be the no. of people. We have to find x.

(1) x+2 ≥ 10, x ≥ 8. NOT SUFFICIENT
(2) x-4 < 5, x < 9. NOT SUFFICIENT
(1) & (2) x must be interger, as number of people. ∴ x=8. SUFFICIENT

Ans: C
Director
Director
avatar
P
Joined: 18 May 2019
Posts: 528
GMAT ToolKit User Premium Member CAT Tests
Re: A certain number of people wait in line at a bank until served. How ma  [#permalink]

Show Tags

New post 14 Nov 2019, 13:29
2
We are to determine the number of people presently in line to be served at the bank.

Let x be the number of people currently in the queue in the bank.

Statement 1: If 2 more people joined the line and none of those currently waiting were served, there would be at least 10 people waiting in line.
x+2 ≥ 10
this implies x≥8
Not sufficient since we can have 8, 9, 10, and many other possibilities of people waiting in line to be served.

Statement 2: If no more people joined the line and 4 of the people currently waiting were served, there would be fewer than 5 people waiting in line.
x-4 < 5
x<9
Not sufficient since the number of people waiting in line can be 8, 7, or 6. Statement does not lead to a unique value of x.

1+2
x≥8 and x<9
from the above, we are able to conclusively say that x=8.
Hence, both statements taken together is sufficient.

The answer is option C.
GMAT Club Bot
Re: A certain number of people wait in line at a bank until served. How ma   [#permalink] 14 Nov 2019, 13:29
Display posts from previous: Sort by

A certain number of people wait in line at a bank until served. How ma

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  





Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne