GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 15 Jun 2019, 21:53

### 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

# If none of the students are ambidextrous, what percentage of the 20 st

Author Message
TAGS:

### Hide Tags

Senior Manager
Joined: 17 Sep 2013
Posts: 330
Concentration: Strategy, General Management
GMAT 1: 730 Q51 V38
WE: Analyst (Consulting)
If none of the students are ambidextrous, what percentage of the 20 st  [#permalink]

### Show Tags

Updated on: 15 Jan 2019, 08:29
1
00:00

Difficulty:

5% (low)

Question Stats:

87% (01:00) correct 13% (01:01) wrong based on 384 sessions

### HideShow timer Statistics

If none of the students are ambidextrous, what percentage of the 20 students in Mr. Henderson's class are left-handed?

(1) Of the 12 girls in the class, 25% are left-handed.
(2) 5 of the boys in the class are right-handed

_________________
Appreciate the efforts...KUDOS for all
Don't let an extra chromosome get you down..

Originally posted by JusTLucK04 on 11 Apr 2014, 05:56.
Last edited by Bunuel on 15 Jan 2019, 08:29, edited 2 times in total.
Edited the question and added the OA
Math Expert
Joined: 02 Sep 2009
Posts: 55609
Re: If none of the students are ambidextrous, what percentage of the 20 st  [#permalink]

### Show Tags

11 Apr 2014, 06:37
JusTLucK04 wrote:
If none of the students are ambidextrous, what percentage of the 20 students in Mr. Henderson's class are left-handed?

(1) Of the 12 girls in the class, 25% are left-handed.
(2) 5 of the boys in the class are right-handed

Kudos for the OA & OE..

Below is a matrix solution for the problem:
Attachment:

Untitled.png [ 17.59 KiB | Viewed 5119 times ]

Hope it helps.
_________________
Manager
Joined: 20 Dec 2013
Posts: 225
Location: India
Re: If none of the students are ambidextrous, what percentage of the 20 st  [#permalink]

### Show Tags

11 Apr 2014, 11:19
1
Option C.
S1:We know out of 20 students,12 are girls So 8 are boys.And out of 12 girls 3 are left handed.But we don't know the data for boys.Insuff.
S2:5 boys are left handed.But we don't know the total no. Of boys or girls from this.Insuff.

S1+S2:Suff as it provides all the required data.

Posted from my mobile device
Intern
Joined: 23 Feb 2015
Posts: 1
Re: If none of the students are ambidextrous, what percentage of the 20 st  [#permalink]

### Show Tags

19 Aug 2015, 00:09
thanks for the solution . but do you think it is wrong if I calculate it in below way,

left handed girl = 25% of 12= 3
left handed boy = 20-12= 8-5= 3

total left handed= 6.
Non-Human User
Joined: 09 Sep 2013
Posts: 11356
Re: If none of the students are ambidextrous, what percentage of the 20 st  [#permalink]

### Show Tags

29 Dec 2018, 08:51
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: If none of the students are ambidextrous, what percentage of the 20 st   [#permalink] 29 Dec 2018, 08:51
Display posts from previous: Sort by