Last visit was: 23 Apr 2024, 23:43 It is currently 23 Apr 2024, 23:43

Close

GRE Prep 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

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 GRE 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.

Close

Request Expert Reply

Confirm Cancel
Intern
Intern
Joined: 02 Mar 2021
Posts: 16
Own Kudos [?]: 53 [6]
Given Kudos: 12
Send PM
Retired Moderator
Joined: 02 Dec 2020
Posts: 1833
Own Kudos [?]: 2118 [0]
Given Kudos: 140
GRE 1: Q168 V157

GRE 2: Q167 V161
Send PM
Verbal Expert
Joined: 18 Apr 2015
Posts: 28620
Own Kudos [?]: 33099 [0]
Given Kudos: 25173
Send PM
Intern
Intern
Joined: 02 Mar 2021
Posts: 16
Own Kudos [?]: 53 [0]
Given Kudos: 12
Send PM
Re: For a certain probability experiment, the probability that Event A- [#permalink]
rx10 wrote:
Sir,

Is it 34 or \(\frac{3}{4}\) ; 12 or \(\frac{1}{2}\) ?

Regards,
R

I corrected the errors. The given probabilities are \(\frac{3}{4}\) and \(\frac{1}{2}\).
Intern
Intern
Joined: 15 Apr 2021
Posts: 12
Own Kudos [?]: 19 [2]
Given Kudos: 31
Send PM
For a certain probability experiment, the probability that Event A- [#permalink]
2
We do not know whether the events overlap. Therefore, we must establish the maximum and minimum bound of their overlap. The maximum overlap would be 1/2, which is the probability of event B (Assume A completely subsumes B). This is the maximum bound of P(A and B). On the other hand, if they do not overlap, meaning they are completely separate, P(A) and P(B) must add up to a number that is less than or equal to 1.

However, P(A) + P(B) = 3/4 + 1/2 = 5/4, which is more than 1. But probability of Event A or B cannot be more than 1. Therefore, there must be some overlap between them, which is: 5/4-1 = 1/4. This means, P(A and B) is at least 1/4. Earlier we established the maximum bound is 1/2. Therefore, 1/4 < P(A and B) < 1/2. Only C is within this range.
Prep Club for GRE Bot
[#permalink]
Moderators:
Moderator
1085 posts
GRE Instructor
218 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne