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
we will pick new questions that match your level based on your Timer History
Track Your Progress
every week, we’ll send you an estimated GMAT score based on your performance
Practice Pays
we will pick new questions that match your level based on your Timer History
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
Enter The Economist GMAT Tutor’s Brightest Minds competition – it’s completely free! All you have to do is take our online GMAT simulation test and put your mind to the test. Are you ready? This competition closes on December 13th.
Attend a Veritas Prep GMAT Class for Free. With free trial classes you can work with a 99th percentile expert free of charge. Learn valuable strategies and find your new favorite instructor; click for a list of upcoming dates and teachers.
Does GMAT RC seem like an uphill battle? e-GMAT is conducting a free webinar to help you learn reading strategies that can enable you to solve 700+ level RC questions with at least 90% accuracy in less than 10 days.
Re: If Jessica rolls a die, what is the probability of getting
[#permalink]
Show Tags
17 Jun 2015, 04:45
2
yamshi06 wrote:
i approached like this , not getting a 3=5/6
atleast=1-5\6 = 1/6
pls explain what is wrong in the approach??
Probability = Favorable Outcomes / Total Outcomes
A Die has 6 faces numbered from 1 through 6
i.e. Total Out comes = 6
Favorable outcomes = Numbers atleast 3 = numbers greater than or equal to 3 i.e. {3, 4, 5, 6} = 4
i.e. Probability = 4/6 = 2/3
ALTERNATIVELY
Probability = 1 -(Unfavorable Outcomes / Total Outcomes
Unfavorable outcomes = Numbers less than 3 = i.e. {1, 2} = 2
i.e. Probability = 1 -(2/6) = 1-(1/3) = 2/3
I hope it clears your doubt! _________________
Prosper!!! GMATinsight Bhoopendra Singh and Dr.Sushma Jha e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772 Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi http://www.GMATinsight.com/testimonials.html
Re: If Jessica rolls a die, what is the probability of getting
[#permalink]
Show Tags
17 Jun 2015, 04:47
yamshi06 wrote:
i approached like this , not getting a 3=5/6
atleast=1-5\6 = 1/6
pls explain what is wrong in the approach??
Please Note "If you subtract the probability of NOT getting 3 from 1 then you will get Probability of getting 3"
whereas the question demand the probability of getting ATLEAST3
_________________
Prosper!!! GMATinsight Bhoopendra Singh and Dr.Sushma Jha e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772 Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi http://www.GMATinsight.com/testimonials.html
Re: If Jessica rolls a die, what is the probability of getting
[#permalink]
Show Tags
17 Jun 2015, 05:32
yamshi06 wrote:
we mainly do like dis, P(at least one success) = 1 – P(no success)
i missing something in this concept plsd explain??
You are getting it Right in this context Yashmi
P(at least one success) = 1 – P(no success) is CORRECT
But Probability of buying atleast 2 apples will NOT be same as (1-probability of buying NO apple)
You must Understand that Probability of buying atleast 2 apples will be equal to (1-probability of NOT buying 2 or more apple) _________________
Prosper!!! GMATinsight Bhoopendra Singh and Dr.Sushma Jha e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772 Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi http://www.GMATinsight.com/testimonials.html
close
80% (00:10) correct 
