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 1508:30 AM PDT
-09:30 AM PDT
Struggling with Boldface or Paradox questions in GMAT Critical Reasoning (CR)? Boldface and Paradox CR questions are often overlooked amidst the other more common GMAT CR question types. But mastering these can significantly boost your Verbal score.- May 15
10:00 AM PDT
-11:00 AM PDT
Struggling to finish the GMAT on time? You’re not alone. The #1 reason students score lower than expected on the GMAT isn’t lack of knowledge or silly mistakes—it’s running out of time. 
May 1609:00 PM PDT
-10:00 PM PDT
Full-length FE mock with insightful analytics, weakness diagnosis, and video explanations!
May 1706:30 AM PDT
-08:30 AM PDT
We know Strengthen and Weaken questions account for more than 50% of the CR questions on the GMAT. With CR becoming even more important on GMAT Focus, it's time you strengthen your weaknesses with an approach that improves your solving time and accuracy!
May 1711:00 AM IST
-01:00 PM IST
Attend this session to learn how to Deconstruct arguments, Pre-Think Author’s Assumptions, and apply Negation Test.- May 18
11:00 AM IST
-01:00 PM IST
Attend this free GMAT Algebra Webinar and learn how to master the most challenging Inequalities and Absolute Value problems with ease. - Jun 10
06:00 AM PDT
-05:30 PM PDT
Register for the GMAT Club Virtual MBA Spotlight fair, the biggest MBA fair of the year. You will have a chance to hear Admissions directors from almost every Top 20 program speak, network with peers, and conveniently attend morning or afternoon sessions.
16 Sep 2014, 01:05
Kudos
Bookmarks
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
65%
(hard)
Question Stats:
60% (02:19) correct
40%
(02:17)
wrong
based on 308
sessions
History
Date
Time
Result
Not Attempted Yet
An electronic clock displays time in hours and minutes. For instance, 08:15 represents a quarter past eight. If someone looks at the clock at a random time between 6:00 (inclusive) and 9:00 (exclusive) what is the probability that he will see the digit 8?
A. \(\frac{1}{5}\)
B. \(\frac{1}{3}\)
C. \(\frac{2}{5}\)
D. \(\frac{4}{9}\)
E. \(\frac{1}{2}\)
A. \(\frac{1}{5}\)
B. \(\frac{1}{3}\)
C. \(\frac{2}{5}\)
D. \(\frac{4}{9}\)
E. \(\frac{1}{2}\)
16 Sep 2014, 01:05
Kudos
Bookmarks
Official Solution:
An electronic clock displays time in hours and minutes. For instance, 08:15 represents a quarter past eight. If someone looks at the clock at a random time between 6:00 (inclusive) and 9:00 (exclusive) what is the probability that he will see the digit 8?
A. \(\frac{1}{5}\)
B. \(\frac{1}{3}\)
C. \(\frac{2}{5}\)
D. \(\frac{4}{9}\)
E. \(\frac{1}{2}\)
The period between 6:00 (inclusive) and 9:00 (exclusive) spans 180 minutes. To find the probability of seeing the digit 8 during this time, we will analyze each hour separately.
1. Between 6:00 and 6:59, there are 6 instances when the digit 8 appears: 06:08, 06:18, 06:28, 06:38, 06:48, and 06:58.
2. Between 7:00 and 7:59, there are also 6 instances when the digit 8 appears: 07:08, 07:18, 07:28, 07:38, 07:48, and 07:58.
3. Between 8:00 and 8:59, the digit 8 appears in every minute (e.g., 08:01, 08:02, 08:03, etc.). So the number of minutes with the digit 8 is 60.
In total, there are 6 + 6 + 60 = 72 minutes with the digit 8 between 6:00 (inclusive) and 9:00 (exclusive). Therefore, the desired probability is given by \(\frac{72}{180} = \frac{2}{5}\).
Answer: C
An electronic clock displays time in hours and minutes. For instance, 08:15 represents a quarter past eight. If someone looks at the clock at a random time between 6:00 (inclusive) and 9:00 (exclusive) what is the probability that he will see the digit 8?
A. \(\frac{1}{5}\)
B. \(\frac{1}{3}\)
C. \(\frac{2}{5}\)
D. \(\frac{4}{9}\)
E. \(\frac{1}{2}\)
The period between 6:00 (inclusive) and 9:00 (exclusive) spans 180 minutes. To find the probability of seeing the digit 8 during this time, we will analyze each hour separately.
1. Between 6:00 and 6:59, there are 6 instances when the digit 8 appears: 06:08, 06:18, 06:28, 06:38, 06:48, and 06:58.
2. Between 7:00 and 7:59, there are also 6 instances when the digit 8 appears: 07:08, 07:18, 07:28, 07:38, 07:48, and 07:58.
3. Between 8:00 and 8:59, the digit 8 appears in every minute (e.g., 08:01, 08:02, 08:03, etc.). So the number of minutes with the digit 8 is 60.
In total, there are 6 + 6 + 60 = 72 minutes with the digit 8 between 6:00 (inclusive) and 9:00 (exclusive). Therefore, the desired probability is given by \(\frac{72}{180} = \frac{2}{5}\).
Answer: C
General Discussion
09 Jul 2016, 08:33
Kudos
Bookmarks
I think this is a high-quality question and I agree with explanation. Superb.
