It is currently 19 Oct 2017, 08:13

# STARTING SOON:

Live Chat with Cornell Adcoms in Main Chat Room  |  R1 Interview Invites: MIT Sloan Chat  |  UCLA Anderson Chat  |  Duke Fuqua Chat (EA Decisions)

### 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

# One bag contains 4 white balls and 2 black balls , another

Author Message
Manager
Joined: 27 Jul 2003
Posts: 122

Kudos [?]: 58 [0], given: 0

Location: Singapore
One bag contains 4 white balls and 2 black balls , another [#permalink]

### Show Tags

09 Oct 2003, 21:11
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

One bag contains 4 white balls and 2 black balls , another bag contains 3 white balls and 5 black balls . if one ball is drawn from each bag, determine the probability p that
a. both are white
b. both are black
c. 1 is white and 1 is black

Kudos [?]: 58 [0], given: 0

CEO
Joined: 15 Aug 2003
Posts: 3454

Kudos [?]: 919 [0], given: 781

Re: white Balls / Black Balls [#permalink]

### Show Tags

09 Oct 2003, 22:53
araspai wrote:
One bag contains 4 white balls and 2 black balls , another bag contains 3 white balls and 5 black balls . if one ball is drawn from each bag, determine the probability p that
a. both are white
b. both are black
c. 1 is white and 1 is black

a. both are white : 4/6 * 3/8 = 1/4
b. both are black : 2/6 * 5/8 = 5/24
c. 1 is white and 1 is black : 4/6*5/8 + 2/6*3/8 = 26/48 = 13/24

EDIT : c) was edited.

Last edited by Praetorian on 14 Oct 2003, 01:05, edited 1 time in total.

Kudos [?]: 919 [0], given: 781

SVP
Joined: 03 Feb 2003
Posts: 1603

Kudos [?]: 303 [0], given: 0

### Show Tags

14 Oct 2003, 00:58
a. agree
b. agree
c. P=P(BW)+P(WB)=2/6*3/8+4/6*5/8=10/12=13/24

EDIT

Last edited by stolyar on 14 Oct 2003, 01:56, edited 1 time in total.

Kudos [?]: 303 [0], given: 0

CEO
Joined: 15 Aug 2003
Posts: 3454

Kudos [?]: 919 [0], given: 781

### Show Tags

14 Oct 2003, 01:07
stolyar wrote:
a. agree
b. agree
c. P=P(BW)+P(WB)=4/6*5/8+5/8*4/6=10/12=5/6

Quote:
4/6*5/8+5/8*4/6

where you get the bold part from...

i edited my solution...see if its ok.

thanks
praetorian

Kudos [?]: 919 [0], given: 781

SVP
Joined: 03 Feb 2003
Posts: 1603

Kudos [?]: 303 [0], given: 0

### Show Tags

14 Oct 2003, 01:56
I have also redacted my solution.

Kudos [?]: 303 [0], given: 0

14 Oct 2003, 01:56
Display posts from previous: Sort by