Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
May 1912:00 PM PDT
-01:00 PM PDT
Scoring 329 on the GRE is not always about using more books, more courses, or a longer study plan. In this episode of GRE Success Talks, Ashutosh shares his GRE preparation strategy, study plan, and test-day experience, explaining how he kept his prep....
May 1212:00 PM EDT
-11:59 PM EDT
Make the most of your break with the most realistic GMAT™ prep. Take up to $700 off select products. Ends 6/1
May 1501:00 PM IST
-11:00 AM IST
Start your journey with a fully customized action plan and work with a dedicated mentor to achieve a 735+ score.- May 18
10:00 AM PDT
-11:00 AM PDT
Join us in a live GMAT practice session and solve 25 challenging GMAT questions with other test takers in timed conditions, covering GMAT Quant, Data Sufficiency, Data Insights, Reading Comprehension, and Critical Reasoning questions. 
May 2008:00 AM PDT
-08:30 AM PDT
What’s in it for you- Live Profile Evaluation Chat Session with Jenifer Turtschanow, CEO, ARINGO. Come with your details prepared and ARINGO will share insights! Pre-MBA Role/Industry, YOE, Exam Score, C/GPA, ECs Post-MBA Role/ Industry & School List.- Jun 10
06:00 AM PDT
-06:15 PM PDT
Register for the GMAT Club Virtual MBA Spotlight Fair – the world’s premier event for serious MBA candidates. This is your chance to hear directly from Admissions Directors at nearly every Top 30 MBA program..
24 Aug 2010, 09:30
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
(N/A)
Question Stats:
0% (00:00) correct
0%
(00:00)
wrong
based on 0
sessions
History
Date
Time
Result
Not Attempted Yet
A license plate in the country Kerrania consists of four digits followed by two letters. The letters A, B, and C are used only by government vehicles while the letters D through Z are used by non-government vehicles. Kerrania's intelligence agency has recently captured a message from the country Gonzalia indicating that an electronic transmitter has been installed in a Kerrania government vehicle with a license plate starting with 79. If it takes the police 10 minutes to inspect each vehicle, what is the probability that the police will find the transmitter within three hours?
A) 18/79
B) 1/6
C) 1/25
D) 1/50
E) 1/900
OA is D which I got it the first time but the it seemed too "simplistic" and then I got confused. S as per my understanding shouldnt the denominator be 171 rather than 8?
171 is derived by assuming that car is found within the first 10 minutes - 1 attempt
Car is found during second attempt : 2 attempts
Car is found during thrid attempt : 3 attempts
.............
............
Car is found in 18th attempt ; 18 attempts
We sum them all up to get 171 and divide it by 900 to get the probability? It is sort of like having first success in nth attempt kind of question so all paths to reach there should be accounted for ?
Help will be appreciated
A) 18/79
B) 1/6
C) 1/25
D) 1/50
E) 1/900
OA is D which I got it the first time but the it seemed too "simplistic" and then I got confused. S as per my understanding shouldnt the denominator be 171 rather than 8?
171 is derived by assuming that car is found within the first 10 minutes - 1 attempt
Car is found during second attempt : 2 attempts
Car is found during thrid attempt : 3 attempts
.............
............
Car is found in 18th attempt ; 18 attempts
We sum them all up to get 171 and divide it by 900 to get the probability? It is sort of like having first success in nth attempt kind of question so all paths to reach there should be accounted for ?
Help will be appreciated
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Problem Solving (PS) Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
24 Aug 2010, 09:48
Kudos
Bookmarks
So there are 900 cars that they have to search.. Each takes 10mins, total of 9000 mins.. Have to find in 180 mins.. Prob180/9000 = 1/50
Posted from my mobile device
Posted from my mobile device
24 Aug 2010, 09:59
Kudos
Bookmarks
#of cars to search: 900 (we know the first two numbers and the fact that it's a gov't. vehicle, so the number of possibilities is 10 x 10 x 3 x 3).
10 minutes per inspection = 6 inspections/min
3 hours @ 6 inspections/min = 18 inspections.
18 inspections out of 900 possible vehicles = 18/900 = 1/50
10 minutes per inspection = 6 inspections/min
3 hours @ 6 inspections/min = 18 inspections.
18 inspections out of 900 possible vehicles = 18/900 = 1/50
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Problem Solving (PS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
