Forum Home > GMAT > Quantitative > Problem Solving (PS)
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.
Jun 0810:30 AM PDT
-11:30 AM PDT
oin us for an insightful conversation with Selena Salazar, a seasoned product manager who has successfully navigated her career through industry giants like Meta and Apple.- Jun 11
05:40 AM PDT
-12:00 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 more. 
Jun 1111:00 AM PDT
-12:00 PM PDT
Magoosh students get into top business schools like MIT Sloan, HBS, Stanford GSB, Wharton and more! See why over 6 million students trust us for exam prep.
Jun 1310:00 AM EDT
-10:30 AM EDT
Level up your Chicago Booth MBA application! Sia Admissions will be LIVE on June 13th for expert guidance on crafting your application that resonates with admission committees. Learn core themes, personal branding tips, and strategies and more.
Jun 1311:00 AM EDT
-12:00 PM EDT
TTP has received over 700 reviews on GMAT Club! This incredible milestone is a testament to our dedication to helping students score high on the GMAT for over a decade.
Jun 1412:00 PM EDT
-01:00 PM EDT
Have you ever wondered how to score a PERFECT 805 on the GMAT Focus Edition? Meet Julia, a banking professional who used the Target Test Prep course to achieve this incredible feat. Julia's story is nothing short of an inspiration.
Jun 1511:00 AM IST
-01:00 PM IST
In this webinar, Rajat Sadana, GMAT Club’s #1 rated expert will help you create a personalized study plan so that each one of you can visualize your journey to a top GMAT Focus Score.
The probability that a man speaks a true statement is 3/4.
[#permalink]
19 Mar 2016, 05:41
19 Mar 2016, 05:41
1
Bookmarks
Expert Reply
Show timer
00:00
A
B
C
D
E
Difficulty:
15%
(low)
Question Stats:
81% (01:10) correct
19%
(01:17)
wrong
based on 58
sessions
The probability that a man speaks a true statement is \(\frac{3}{4}\). If he gives three statements in a row, what is the probability that he told atleast one lie?
A.\(\frac{1}{4}\)
B. \(\frac{17}{64}\)
C.\(\frac{27}{64}\)
D. \(\frac{37}{64}\)
E. \(\frac{3}{4}\)
A.\(\frac{1}{4}\)
B. \(\frac{17}{64}\)
C.\(\frac{27}{64}\)
D. \(\frac{37}{64}\)
E. \(\frac{3}{4}\)
Re: The probability that a man speaks a true statement is 3/4.
[#permalink]
19 Mar 2016, 09:28
19 Mar 2016, 09:28
1
Kudos
chetan2u wrote:
The probability that a man speaks a true statement is \(\frac{3}{4}\). If he gives three statements in a row, what is the probability that he told atleast one lie?
A.\(\frac{1}{4}\)
B. \(\frac{17}{64}\)
C.\(\frac{27}{64}\)
D. \(\frac{37}{64}\)
E. \(\frac{3}{4}\)
A.\(\frac{1}{4}\)
B. \(\frac{17}{64}\)
C.\(\frac{27}{64}\)
D. \(\frac{37}{64}\)
E. \(\frac{3}{4}\)
The probability that he told at least 1 lie = 1- P (no lies)
=> 1- (3/4*3/4*3/4) = 1- 27/64 = 37/64.
So Answer D.
Is this correct??
Re: The probability that a man speaks a true statement is 3/4.
[#permalink]
19 Mar 2016, 09:45
19 Mar 2016, 09:45
1
Bookmarks
Probability that he told atleast one lie = 1 - (Probability of speaking all three truth statements)
Probability of all 3 truths = (3/4)^3 = 27/64.
Probability that he told atleast one lie = 1 - (27/64) = 37/64.
Answer: D
You are correct MeghaP
Probability of all 3 truths = (3/4)^3 = 27/64.
Probability that he told atleast one lie = 1 - (27/64) = 37/64.
Answer: D
You are correct MeghaP
