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

It is currently 21 Feb 2020, 04:13

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

In a health club, 70% of the members who take protein supplements repo

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

Hide Tags

Find Similar Topics 
Senior PS Moderator
User avatar
V
Joined: 26 Feb 2016
Posts: 3265
Location: India
GPA: 3.12
In a health club, 70% of the members who take protein supplements repo  [#permalink]

Show Tags

New post 24 Apr 2018, 10:30
1
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

81% (01:59) correct 19% (02:10) wrong based on 48 sessions

HideShow timer Statistics

In a health club, 70% of the members who take protein supplements report getting good results. 60% of the
members not taking the supplements report not getting good results. If 40% members of the club take protein
supplements, what percentage of the members report not getting good results?

A. 18%
B. 36%
C. 39%
D. 48%
E. 52%

Source: Experts Global

_________________
You've got what it takes, but it will take everything you've got
Senior Manager
Senior Manager
User avatar
G
Joined: 29 Dec 2017
Posts: 368
Location: United States
Concentration: Marketing, Technology
GMAT 1: 630 Q44 V33
GMAT 2: 690 Q47 V37
GMAT 3: 710 Q50 V37
GPA: 3.25
WE: Marketing (Telecommunications)
In a health club, 70% of the members who take protein supplements repo  [#permalink]

Show Tags

New post 24 Apr 2018, 10:43
The method is 2 x 2 table:

-------------Protein(+) Protein(-) Total
Results (+)---0.7x---------0.4y----0.7x+0.4y
Results (-)----0.3x---------0.6y----0.3x+0.6y
Total------------x-------------y------- x+y

We have to find: Results (-)/Total =(0.3x+0.6y)/(x+y) *100%
where x = 0.4(x+y) => y=3x/2

Substituting y with 3x/2, we get 48%. Answer (D).
Intern
Intern
User avatar
B
Joined: 31 Jan 2018
Posts: 39
Location: Germany
GMAT 1: 610 Q44 V30
GPA: 3
WE: Supply Chain Management (Manufacturing)
GMAT ToolKit User Reviews Badge
Re: In a health club, 70% of the members who take protein supplements repo  [#permalink]

Show Tags

New post 24 Apr 2018, 10:49
1
1
I calculated with 100 club members

Hence, 48/100 = 48% D
Attachments

File comment: grid
xtest.png
xtest.png [ 2.65 KiB | Viewed 700 times ]

Manager
Manager
User avatar
B
Joined: 26 Sep 2017
Posts: 95
Re: In a health club, 70% of the members who take protein supplements repo  [#permalink]

Show Tags

New post 24 Apr 2018, 12:30
pushpitkc wrote:
In a health club, 70% of the members who take protein supplements report getting good results. 60% of the
members not taking the supplements report not getting good results. If 40% members of the club take protein
supplements, what percentage of the members report not getting good results?

A. 18%
B. 36%
C. 39%
D. 48%
E. 52%

Source: Experts Global



simply assume total members in the club = 100

given 40% take supplements = 40 persons
so person who didn't take supplements = 100-40 =60

and 70% of person taking supplement getting good result but we are concerned with not good result so
30% are not good result who take supplement = 40 * 30% = 12

and 60% who didn't take supplement not getting result = 60*60% = 36

total person = 36+12 = 48 which is 48% ..
D
Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 14117
Re: In a health club, 70% of the members who take protein supplements repo  [#permalink]

Show Tags

New post 10 Jan 2020, 02:19
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.
_________________
GMAT Club Bot
Re: In a health club, 70% of the members who take protein supplements repo   [#permalink] 10 Jan 2020, 02:19
Display posts from previous: Sort by

In a health club, 70% of the members who take protein supplements repo

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





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