It is currently 19 Oct 2017, 15:15

### 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

# On a certain road, 10 percent of the motorist exceed the

Author Message
Current Student
Joined: 29 Jan 2005
Posts: 5206

Kudos [?]: 434 [0], given: 0

On a certain road, 10 percent of the motorist exceed the [#permalink]

### Show Tags

22 Jan 2006, 05:28
00:00

Difficulty:

(N/A)

Question Stats:

100% (00:01) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

On a certain road, 10 percent of the motorist exceed the posted speed limit and receive speeding tickets, but 20 percent of the motorists who exceed the posted speed limit do not receive speeding tickets. What percent of the motorist on that road exceed the posted speed limit?

A) 10 1/2%
B) 12 1/2 %
C) 15 %
D) 22%
E) 30%

Kudos [?]: 434 [0], given: 0

VP
Joined: 21 Sep 2003
Posts: 1057

Kudos [?]: 82 [1], given: 0

Location: USA

### Show Tags

22 Jan 2006, 05:39
1
KUDOS
Interesting! is it B 12.5%

Let's say there are 100 motorists.
10% exceeded speed limit and received tickets. = 10

20% of the motorists who exceeded speed limits did not receive tickets.
So 80% of them did receive speeding tickets, who are the 10 people we know.

Hence 80% of the exceeded + got tickets = 10
OR Actual number of people who exceeded = 100*10/80 = 12.5%
_________________

"To dream anything that you want to dream, that is the beauty of the human mind. To do anything that you want to do, that is the strength of the human will. To trust yourself, to test your limits, that is the courage to succeed."

- Bernard Edmonds

Kudos [?]: 82 [1], given: 0

SVP
Joined: 14 Dec 2004
Posts: 1681

Kudos [?]: 168 [0], given: 0

### Show Tags

22 Jan 2006, 06:46
Very good question

"B" it is. 12.5%

Kudos [?]: 168 [0], given: 0

VP
Joined: 29 Dec 2005
Posts: 1338

Kudos [?]: 69 [0], given: 0

### Show Tags

22 Jan 2006, 08:28
B. 12 1/2%.

but is the question clear? seems little ambigious.

Kudos [?]: 69 [0], given: 0

Current Student
Joined: 28 Dec 2004
Posts: 3351

Kudos [?]: 319 [0], given: 2

Location: New York City
Schools: Wharton'11 HBS'12

### Show Tags

22 Jan 2006, 10:27
OK I think a venn diagram would be ideal for this...but I chose to do equations...

so lets see....10% of motorist got tickts for speeding.

20% of speeding motorist did not get tkts...that means 80% of speeding motorist got tkts
so let X be the number of speeding motorist...

.8X get tkts...= 10% of all motorist get speedin tkts

so 0.8x=0.1

x=1/8 =12.5% B it is...

Kudos [?]: 319 [0], given: 2

VP
Joined: 20 Sep 2005
Posts: 1016

Kudos [?]: 38 [0], given: 0

### Show Tags

22 Jan 2006, 22:12
I got it wrong on PP test yesterday .

Kudos [?]: 38 [0], given: 0

Senior Manager
Joined: 11 Jan 2006
Posts: 266

Kudos [?]: 4 [0], given: 0

Location: Chennai,India

### Show Tags

23 Jan 2006, 23:33
giddi77 wrote:
Interesting! is it B 12.5%

Let's say there are 100 motorists.
10% exceeded speed limit and received tickets. = 10

20% of the motorists who exceeded speed limits did not receive tickets.
So 80% of them did receive speeding tickets, who are the 10 people we know.

Hence 80% of the exceeded + got tickets = 10
OR Actual number of people who exceeded = 100*10/80 = 12.5%

yep! its B
_________________

vazlkaiye porkalam vazltuthan parkanum.... porkalam maralam porkalthan maruma

Kudos [?]: 4 [0], given: 0

23 Jan 2006, 23:33
Display posts from previous: Sort by