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# Speeding ticket............

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Manager
Joined: 02 Sep 2008
Posts: 103
Followers: 1

Kudos [?]: 31 [1] , given: 1

Speeding ticket............ [#permalink]  27 Apr 2009, 18:27
1
KUDOS
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 100% (00:54) wrong based on 1 sessions
Attachment:

ps1.JPG [ 17.27 KiB | Viewed 974 times ]
Senior Manager
Joined: 08 Jan 2009
Posts: 329
Followers: 2

Kudos [?]: 88 [0], given: 5

Re: Speeding ticket............ [#permalink]  27 Apr 2009, 21:44
Excellent. I was sitting for the past 10 min to get past this.

Thanks. This one seemed some what tricky.
Manager
Joined: 02 Mar 2009
Posts: 138
Followers: 1

Kudos [?]: 35 [0], given: 0

Re: Speeding ticket............ [#permalink]  27 Apr 2009, 21:56
A slightly more algebraic approach:

Say total = 100

Exeed & Ticketed = 10
Exceed but Not ticketed = x
Total exceeded = 10 + x

20/100 (10+x) = x

x = 2..5

Total Exceeded 12.5 or 12.5%
Manager
Joined: 08 Feb 2009
Posts: 147
Schools: Anderson
Followers: 3

Kudos [?]: 33 [0], given: 3

Re: Speeding ticket............ [#permalink]  28 Apr 2009, 04:10
typhoidX wrote:
Haha... got confused for a while... the signs do not bode well for me on the GMAT...

Anyway, to simplify, we'll assume 100 people drive on this road.

20 percent of violators do not receive tickets, therefore 80% of the violators do.

We know those who receive tickets consist of 10% of all drivers on this road, so 10 people. In other words, these 10 people make up the aforementioned 80%.

100% of violators would be 10/0.8 = 12.5, so 12 people & half a bloody corpse, or 12.5%.

You solved it well !!!
Intern
Joined: 02 May 2009
Posts: 7
Followers: 0

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

Re: Speeding ticket............ [#permalink]  14 May 2009, 18:06
I especially like the bloody corpse...people need to make math more fun! That's the best way to learn
Director
Joined: 23 May 2008
Posts: 840
Followers: 3

Kudos [?]: 37 [0], given: 0

Re: Speeding ticket............ [#permalink]  15 May 2009, 09:19
E

30% using double matrix

-------------speed---------no speed
ticket---------.10-------------------
no ticket------.20-------------------
total----------.30-----------.70----------1
Re: Speeding ticket............   [#permalink] 15 May 2009, 09:19
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