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.
Apr 2711:00 AM EDT
-12:00 PM EDT
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors
Apr 2610:00 AM EDT
-11:00 AM EDT
The Target Test Prep course represents a quantum leap forward in GMAT preparation, a radical reinterpretation of the way that students should study. Try before you buy with a 5-day, full-access trial of the course for FREE!
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
20 Nov 2016, 09:44
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
37% (02:56) correct
63%
(02:35)
wrong
based on 153
sessions
History
Date
Time
Result
Not Attempted Yet
A. \(\frac{2}{7}\)
B. \(\frac{3}{8}\)
C. \(\frac{3}{7}\)
D. \(\frac{1}{2}\)
E. \(\frac{5}{7}\)
The length of Alice's commute, in minutes, differs depending on whether it's a weekday or weekend.
The probability of how long the weekday commute will take is included in the table below.
0 - 15 Minutes 15 - 30 Minutes 30 - 45 Minutes 45 Minutes or More
0.05 0.25 0.4 0.3
The probability of how long the weekend commute will take is included in the table below.
0 - 15 Minutes 15 - 30 Minutes 30 - 45 Minutes 45 Minutes or More
0.25 0.50 0.15 0.1
If Alice's commute took 30 minutes or less today, what is the probability that today is a weekday? Assume Alice commutes every day and that weekdays are considered to be Monday-Friday.
Attachment:
Veritas.PNG [ 28.3 KiB | Viewed 5770 times ]
I have no clue how to go about this question
Mbawarrior01
P(B given A) = P(A and B)/P(A)
P('Weekday' given '30 mins or less') = P(Weekday and 30 mins or less) / P(30 mins or less)
P(Weekday and 30 mins or less) = (5/7) * 0.3 = 1.5/7
P(30 mins or less) = (5/7) * 0.3 + (2/7) * .75 = 3/7
P('Weekday' given '30 mins or less') = (1.5/7) / (3/7) = 1/2
21 Nov 2016, 16:06
Kudos
Bookmarks
I'm not sure my thinking is correct but I got the right answer.
so my guess was:
Probability of being on a week day= 5/7
Probability of having a commute of 30 minutes or less on a week day: 0.40+0.25+0.05=0.7
Probability of having a commute of 30 minutes or less and being on a weekday is : (5/7)*(0.7)= 1/2
AC:D
so my guess was:
Probability of being on a week day= 5/7
Probability of having a commute of 30 minutes or less on a week day: 0.40+0.25+0.05=0.7
Probability of having a commute of 30 minutes or less and being on a weekday is : (5/7)*(0.7)= 1/2
AC:D
