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

 It is currently 28 May 2017, 22:16

### 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

# Three groups of children contain (i) 3 girls and 1 boy; (ii)

Author Message
Intern
Joined: 29 Aug 2003
Posts: 29
Location: Mumbai
Followers: 0

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

Three groups of children contain (i) 3 girls and 1 boy; (ii) [#permalink]

### Show Tags

10 Dec 2003, 06:17
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Three groups of children contain (i) 3 girls and 1 boy; (ii) 3 girls and 3 boys; (iii) 2 boys and 1 girl. One child is selected at random from each group. Find the probability that the three selected children comprise of 1 girl and 2 boys.
Director
Joined: 13 Nov 2003
Posts: 789
Location: BULGARIA
Followers: 1

Kudos [?]: 53 [0], given: 0

### Show Tags

10 Dec 2003, 06:35
possible outcomes bbb,ggg,bgg,bbg, the prob of having bgg is 1/4
SVP
Joined: 03 Feb 2003
Posts: 1604
Followers: 9

Kudos [?]: 269 [0], given: 0

### Show Tags

10 Dec 2003, 06:47
such q-s will never appear on the real test.
Intern
Joined: 29 Aug 2003
Posts: 29
Location: Mumbai
Followers: 0

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

### Show Tags

10 Dec 2003, 06:51
Then what kinda questions can we expect on the real test??

Gaurav.
SVP
Joined: 03 Feb 2003
Posts: 1604
Followers: 9

Kudos [?]: 269 [0], given: 0

### Show Tags

10 Dec 2003, 07:30
basic probability, no more
this question requires applying a full probability formula.
Director
Joined: 28 Oct 2003
Posts: 501
Location: 55405
Followers: 1

Kudos [?]: 25 [0], given: 0

### Show Tags

10 Dec 2003, 08:13
stolyar wrote: such q-s will never appear on the real test.

It's not a terribly difficult question, however.

GROUP 1: P OF GIRL .75
GROUP 2: P OF GIRL .50
GROUP 3: P OF GIRL .33 (APPX)

GBB: .75*.5*.67 .25125
BGB: .25*.5*.67 .08375
BBG: .25*.5*.33 .04125
---------
.37625
Director
Joined: 13 Nov 2003
Posts: 960
Location: Florida
Followers: 1

Kudos [?]: 145 [0], given: 0

### Show Tags

12 Dec 2003, 20:00
stolyar wrote:
basic probability, no more
this question requires applying a full probability formula.

agreed..
BBG=1/4.3/6.1/3
BGB=1/4.3/6.2/3
GBB=3/4.3/6.2/3

prob. = 3/8
12 Dec 2003, 20:00
Display posts from previous: Sort by