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.
Nov 2007:30 AM PST
-08:30 AM PST
Learn what truly sets the UC Riverside MBA apart and how it helps in your professional growth
Nov 2211:00 AM IST
-01:00 PM IST
Do RC/MSR passages scare you? e-GMAT is conducting a masterclass to help you learn – Learn effective reading strategies Tackle difficult RC & MSR with confidence Excel in timed test environment- Nov 23
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. 
Nov 2510:00 AM EST
-11:00 AM EST
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.
02 May 2025, 04:25
Kudos
Bookmarks
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
60% (00:50) correct
40%
(01:06)
wrong
based on 89
sessions
History
Date
Time
Result
Not Attempted Yet
What is the probability that Alicia will visit the museum on Sunday?
(1) The probability that she visits the museum on Saturday is 50%
(2) Alicia never visits the museum two days in a row.
Gentle note to all experts and tutors: Please refrain from replying to this question until the Official Answer (OA) is revealed. Let students attempt to solve it first. You are all welcome to contribute posts after the OA is posted. Thank you all for your cooperation!
(1) The probability that she visits the museum on Saturday is 50%
(2) Alicia never visits the museum two days in a row.
Gentle note to all experts and tutors: Please refrain from replying to this question until the Official Answer (OA) is revealed. Let students attempt to solve it first. You are all welcome to contribute posts after the OA is posted. Thank you all for your cooperation!
11 May 2025, 07:30
Kudos
Bookmarks
Official Solution:
What is the probability that Alicia will visit the museum on Sunday?
(1) The probability that she visits the museum on Saturday is 50%.
This tells us nothing about Sunday. Not sufficient.
(2) Alicia never visits the museum two days in a row.
If she visits on Saturday, she won’t visit on Sunday. Not sufficient.
(1)+(2) If Alicia visits on Saturday (50% chance), then she will not visit on Sunday. If she does not visit on Saturday (also 50%), her Sunday visit probability is unknown. So, the overall probability of a Sunday visit is:
\(P(\text{visit on Sunday}) = 0.5 * 0 + 0.5 * p = 0.5p\)
Since \(p\), the probability that she visits on Sunday if she does not visit on Saturday, is unknown, the total probability remains unknown. Not sufficient.
Answer: E
What is the probability that Alicia will visit the museum on Sunday?
(1) The probability that she visits the museum on Saturday is 50%.
This tells us nothing about Sunday. Not sufficient.
(2) Alicia never visits the museum two days in a row.
If she visits on Saturday, she won’t visit on Sunday. Not sufficient.
(1)+(2) If Alicia visits on Saturday (50% chance), then she will not visit on Sunday. If she does not visit on Saturday (also 50%), her Sunday visit probability is unknown. So, the overall probability of a Sunday visit is:
\(P(\text{visit on Sunday}) = 0.5 * 0 + 0.5 * p = 0.5p\)
Since \(p\), the probability that she visits on Sunday if she does not visit on Saturday, is unknown, the total probability remains unknown. Not sufficient.
Answer: E
General Discussion
02 May 2025, 23:26
Kudos
Bookmarks
What is the probability that Alicia will visit the museum on Sunday?
(1) The probability that she visits the museum on Saturday is 50%
(2) Alicia never visits the museum two days in a row.
St. 1 Alone: Probability of a visit on Sunday cannot be deduced. Not sufficient.
St. 2 Alone: No information on whether she will visit on Sunday. Not Sufficient.
St. 1 & 2.
Let,
- P(a) = Prbability that she visits on Sat
- P(b) - Prbability that she vists on Sun
We need to find P(b)
P(b) = P(b|a)*P(a) + P(b|a')*P(a') --- where a' is complement of a, which in this case P(a') = probability of no vist on Sat.
= 0 * 0.5 + (not known) * 0.5
Since we do not know P(b|a') i.e. probability of a vist on Sund given that she does not visit on Sat, we cannot deduce the answer from both statements together.
Hence, answer is E IMO
(1) The probability that she visits the museum on Saturday is 50%
(2) Alicia never visits the museum two days in a row.
St. 1 Alone: Probability of a visit on Sunday cannot be deduced. Not sufficient.
St. 2 Alone: No information on whether she will visit on Sunday. Not Sufficient.
St. 1 & 2.
Let,
- P(a) = Prbability that she visits on Sat
- P(b) - Prbability that she vists on Sun
We need to find P(b)
P(b) = P(b|a)*P(a) + P(b|a')*P(a') --- where a' is complement of a, which in this case P(a') = probability of no vist on Sat.
= 0 * 0.5 + (not known) * 0.5
Since we do not know P(b|a') i.e. probability of a vist on Sund given that she does not visit on Sat, we cannot deduce the answer from both statements together.
Hence, answer is E IMO
