GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

 It is currently 29 May 2020, 02:14

### 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

# An analyst will recommend a combination of 3 industrial stocks..

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

### Hide Tags

Intern
Joined: 17 Jan 2016
Posts: 10
An analyst will recommend a combination of 3 industrial stocks..  [#permalink]

### Show Tags

05 May 2016, 07:23
8
00:00

Difficulty:

(N/A)

Question Stats:

84% (01:22) correct 16% (01:44) wrong based on 215 sessions

### HideShow timer Statistics

An analyst will recommend a combination of 3 industrial stocks, 2 transportation stocks, and 2 utility stocks. If the analyst can choose from 5 industrial stocks, 4 transportation stocks, and 3 utility stocks, how many different combinations of 7 stocks are possible?

A. 12
B. 19
C. 60
D. 180
E. 720

--
Math Expert
Joined: 02 Sep 2009
Posts: 64234
Re: An analyst will recommend a combination of 3 industrial stocks..  [#permalink]

### Show Tags

06 Dec 2017, 19:51
anasmousa wrote:
Why you are product them rather than add them ?

Sent from my BLL-L21 using GMAT Club Forum mobile app

Because of Principle of Multiplication.

Principle of Multiplication
If an operation can be performed in ‘m’ ways and when it has been performed in any of these ways, a second operation that can be performed in ‘n’ ways then these two operations can be performed one after the other in ‘m*n’ ways.

21. Combinatorics/Counting Methods

For more:
ALL YOU NEED FOR QUANT ! ! !
Ultimate GMAT Quantitative Megathread

Hope it helps.
_________________
##### General Discussion
Math Expert
Joined: 02 Sep 2009
Posts: 64234
Re: An analyst will recommend a combination of 3 industrial stocks..  [#permalink]

### Show Tags

05 May 2016, 07:31
2
2
broilerc wrote:
An analyst will recommend a combination of 3 industrial stocks, 2 transportation stocks, and 2 utility stocks. If the analyst can choose from 5 industrial stocks, 4 transportation stocks, and 3 utility stocks, how many different combinations of 7 stocks are possible?

A. 12
B. 19
C. 60
D. 180
E. 720

--

5C3 * 4C2 * 3C2 = 10*6*3 = 180.

_________________
Intern
Joined: 17 Aug 2016
Posts: 46
An analyst will recommend a combination of 3 industrial stocks..  [#permalink]

### Show Tags

25 Feb 2017, 08:36
Bunuel wrote:
broilerc wrote:
An analyst will recommend a combination of 3 industrial stocks, 2 transportation stocks, and 2 utility stocks. If the analyst can choose from 5 industrial stocks, 4 transportation stocks, and 3 utility stocks, how many different combinations of 7 stocks are possible?

A. 12
B. 19
C. 60
D. 180
E. 720

--

5C3 * 4C2 * 3C2 = 10*6*3 = 180.

Hi Bunuel, when I faced this question I was a bit concerned by the fact that I am not dividing the 180 by 3!. In this way am I not considering the order why the order shouldn't be considered?

Thanks
Intern
Joined: 05 Aug 2017
Posts: 4
Re: An analyst will recommend a combination of 3 industrial stocks..  [#permalink]

### Show Tags

06 Dec 2017, 14:04
Why you are product them rather than add them ?

Sent from my BLL-L21 using GMAT Club Forum mobile app
Target Test Prep Representative
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 10590
Location: United States (CA)
Re: An analyst will recommend a combination of 3 industrial stocks..  [#permalink]

### Show Tags

08 Dec 2017, 11:55
1
1
broilerc wrote:
An analyst will recommend a combination of 3 industrial stocks, 2 transportation stocks, and 2 utility stocks. If the analyst can choose from 5 industrial stocks, 4 transportation stocks, and 3 utility stocks, how many different combinations of 7 stocks are possible?

A. 12
B. 19
C. 60
D. 180
E. 720

We have a basic combination problem in which an analyst has to select 3 industrial stocks from 5, 2 transportation stocks from 4, and 2 utility stocks from 3. Let’s determine the number of ways to select each type of stock.

3 industrial stocks from 5: 5C3 = (5 x 4 x 3)/3! = (5 x 4 x 3)/(3 x 2 x 1) = 10 ways

2 transportation stocks from 4: 4C2 = (4 x 3)/2! = (4 x 3)/(2 x 1) = 6 ways

2 utility stocks from 3: 3C2 = (3 x 2)/2! = (3 x 2)/(2 x 1) = 3 ways

Since the analyst is choosing all 3 types of stocks, there are 10 x 6 x 3 = 180 ways to select the stocks.

_________________

# Scott Woodbury-Stewart

Founder and CEO

Scott@TargetTestPrep.com
202 Reviews

5-star rated online GMAT quant
self study course

See why Target Test Prep is the top rated GMAT quant course on GMAT Club. Read Our Reviews

If you find one of my posts helpful, please take a moment to click on the "Kudos" button.

Non-Human User
Joined: 09 Sep 2013
Posts: 15014
Re: An analyst will recommend a combination of 3 industrial stocks..  [#permalink]

### Show Tags

14 Mar 2020, 13:41
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Re: An analyst will recommend a combination of 3 industrial stocks..   [#permalink] 14 Mar 2020, 13:41

# An analyst will recommend a combination of 3 industrial stocks..

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

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