Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 28 Apr 2017, 16:46

### 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

we will pick new questions that match your level based on your Timer History

Track

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Let A and B be events such that P(A ^ B) = 1/4, P(

Author Message
SVP
Joined: 16 Oct 2003
Posts: 1807
Followers: 5

Kudos [?]: 150 [0], given: 0

Let A and B be events such that P(A ^ B) = 1/4, P( [#permalink]

### Show Tags

04 Nov 2003, 13:40
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Let A and B be events such that P(A ^ B) = 1/4, P( ╦Ь A) = 1/3, and P(B) =
1/2. What is P(A U B)?
Intern
Joined: 04 Oct 2003
Posts: 42
Location: Silicon Valley, CA
Followers: 0

Kudos [?]: 1 [0], given: 0

### Show Tags

04 Nov 2003, 19:52
does P(A ANd B) mean P(A OR B)

the formula that you are looking for i s
P(A OR B) = P(A) + P(B) - P (A AND B)
= 1 - P(~A) + P(B) - P(A AND B)
= 1 - 1/3 + 1/2 - 1/4
= 11/12
SVP
Joined: 03 Feb 2003
Posts: 1603
Followers: 9

Kudos [?]: 260 [0], given: 0

### Show Tags

05 Nov 2003, 00:38
agree
P(A OR B) = P(A) + P(B) - P (A AND B)
1/4=2/3+1/2-X
X=11/12
05 Nov 2003, 00:38
Display posts from previous: Sort by