Each of the 25 balls in a certain box are either red, blue : Quant Question Archive [LOCKED]
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 23 Jan 2017, 06:05

### 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

# Each of the 25 balls in a certain box are either red, blue

Author Message
Manager
Joined: 21 Dec 2005
Posts: 102
Followers: 1

Kudos [?]: 4 [0], given: 0

Each of the 25 balls in a certain box are either red, blue [#permalink]

### Show Tags

07 Apr 2006, 19:32
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Each of the 25 balls in a certain box are either red, blue or white and has a number painted on it from 1 to 10. If one ball is to be selected at random from the box what is the probability that the ball selected will be either white or have an even number painted on it?

1. The probability that the ball will be both white and have an even number painted on it is 0

2. The probability that the ball will be white minus the probability that the ball will have an even number painted on it is 0.2
SVP
Joined: 14 Dec 2004
Posts: 1702
Followers: 3

Kudos [?]: 137 [0], given: 0

### Show Tags

07 Apr 2006, 19:59
We need P(W+E) = P(W) + P(E) - P(W.E)

St1: P(W.E) = 0
Insufficient

St2: P(W) - P(E) = 0.2
Insufficient

Together, we can express P(W) in terms on P(E) & P(W.E) = 0, but still can't determine the value.

So "E"
Manager
Joined: 27 Mar 2006
Posts: 136
Followers: 1

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

### Show Tags

07 Apr 2006, 20:07

1) Does not tell you the probability of white balls and probability of even numbers occuring
2) Still need to know number of white balls or number of even numbers

So E
Senior Manager
Joined: 22 Nov 2005
Posts: 476
Followers: 2

Kudos [?]: 20 [0], given: 0

### Show Tags

07 Apr 2006, 22:52
We need number for the white ball.

But from both statement we can't get it.

SO E
07 Apr 2006, 22:52
Display posts from previous: Sort by