Apr 27 07:00 AM PDT  09:00 AM PDT Attend this webinar and master GMAT SC in 10 days by learning how meaning and logic can help you tackle 700+ level SC questions with ease. Apr 28 07:00 AM PDT  09:00 AM PDT Attend this webinar to learn a structured approach to solve 700+ Number Properties question in less than 2 minutes. Apr 29 08:00 AM PDT  09:00 AM PDT Join a free live webinar and learn timemanagement tactics that will guarantee you answer all questions, in all sections, on time. Save your spot today! Apr 30 10:00 PM PDT  11:00 PM PDT Enter to win 3 full months of access to EMPOWERgmat's groundbreaking GMAT prep course. Prize includes all 6 GMAT Official Practice exams and access to the GMAT Club Test & Quiz Bank Pack. May 01 10:00 PM PDT  11:00 PM PDT Target Test Prep is kicking off spring with a fresh giveaway contest! For a limited time, you have a chance to win 4 months of full, FREE access to our 5star rated GMAT Quant course.
Author 
Message 
TAGS:

Hide Tags

Retired Moderator
Joined: 27 Aug 2012
Posts: 1082

In GoshawkEurasian nature reserve 30 percent of the birds
[#permalink]
Show Tags
27 Apr 2013, 03:45
Question Stats:
77% (02:28) correct 23% (02:37) wrong based on 336 sessions
HideShow timer Statistics
In GoshawkEurasian nature reserve 30 percent of the birds are Hawks, and 40 percent of the nonHawks are PaddyfieldWarblers. If there are 25 percent as many Kingfishers as PaddyfieldWarblers in the reserve, then what percent of the birds in the nature reserve are not Hawks, PaddyfieldWarblers, or Kingfishers? A. 25% B. 35% C. 45% D. 70% E. 80% P.S: Bunuel/KarishmaCan you please come up with a detail explanation for the solution. And is it a 700+ problem? I doubt although...
Official Answer and Stats are available only to registered users. Register/ Login.
_________________




Tutor
Joined: 20 Apr 2012
Posts: 99
Location: Ukraine
GMAT 1: 690 Q51 V31 GMAT 2: 730 Q51 V38
WE: Education (Education)

Re: In GoshawkEurasian nature reserve 30 percent of the birds
[#permalink]
Show Tags
27 Apr 2013, 04:12
I'm not Bunuel/Karishma, but I can try to help you. I don't think that it is 700+ problem. You even don't need any equations. Just be accurate with percents. Since the problem doesn't depend on the number of birds in reserve you can suppose that there are 100 birds. From them 100*0.3=30 are Hawks.So, there are 70 nonHawks. There are 0.4*70=28 PaddyfieldWarblers. Therefore, there are 0.25*28=7 Kingfishers. The total number of birds in the nature reserve that are not Hawks, PaddyfieldWarblers, or Kingfishers is 10030287=35. The answer is B. Hope this helps.
_________________
I'm happy, if I make math for you slightly clearer And yes, I like kudos:)




Retired Moderator
Joined: 27 Aug 2012
Posts: 1082

Re: In GoshawkEurasian nature reserve 30 percent of the birds
[#permalink]
Show Tags
27 Apr 2013, 11:15
smyarga wrote: I'm not Bunuel/Karishma, but I can try to help you. I don't think that it is 700+ problem. You even don't need any equations. Just be accurate with percents.
Since the problem doesn't depend on the number of birds in reserve you can suppose that there are 100 birds. From them 100*0.3=30 are Hawks.So, there are 70 nonHawks.
There are 0.4*70=28 PaddyfieldWarblers. Therefore, there are 0.25*28=7 Kingfishers.
The total number of birds in the nature reserve that are not Hawks, PaddyfieldWarblers, or Kingfishers is 10030287=35.
The answer is B.
Hope this helps. Thanks smyarga I was somewhat confused with my own explanation...! It's clear now..
_________________



Tutor
Joined: 20 Apr 2012
Posts: 99
Location: Ukraine
GMAT 1: 690 Q51 V31 GMAT 2: 730 Q51 V38
WE: Education (Education)

Re: In GoshawkEurasian nature reserve 30 percent of the birds
[#permalink]
Show Tags
27 Apr 2013, 11:25
I'm always happy to help:)
_________________
I'm happy, if I make math for you slightly clearer And yes, I like kudos:)



Intern
Joined: 22 Mar 2013
Posts: 18
Concentration: Operations, Entrepreneurship
GMAT 1: 620 Q47 V28 GMAT 2: 680 Q45 V38
WE: Engineering (Manufacturing)

Re: In GoshawkEurasian nature reserve 30 percent of the birds
[#permalink]
Show Tags
09 Sep 2013, 23:14
In GoshawkEurasian nature reserve 30 percent of the birds are Hawks, and 40 percent of the nonHawks are PaddyfieldWarblers. If there are 25 percent as many Kingfishers as PaddyfieldWarblers in the reserve, then what percent of the birds in the nature reserve are not Hawks, PaddyfieldWarblers, or Kingfishers?
A. 25% B. 35% C. 45% D. 70% E. 80%.
This question can be solved using at least 2 methods. Lets look at them. 1. We are given the following percentages: 30 (70), 40 (60), 25 (75). There are two threads from here. First starts at 30% and finishes there. Second one starts at 70, then 40, and then 25. We need a value that is divisible by 7, 2, and 5 at least once. lets pick a number now, say 700. So say if Non Hawks are 700 (this is 70% of the total, so total = 1000), then Paddy Warbs are 2/5 x 700 = 1400/5 = 280. Kingfishers, therefore, are 280/4 = 70. Lets add them up. 300 hawks + 280 Peddy Warbs + 70 kingsifhers = 650. So all others are 1000  650= 350 or 35% of total birds. The main job here to to identify the smart number to start the question with. This can be time consuming, but once identified, this question can be solved fairly quickly.
2. Another method: If X is total > Non Hawks = 0.7X > Warbs = 0.4(0.7X) > KFs = 0.25(0.4(0.7X)). Our job is to find out : (0.3X + 0.28X + 0.07X)/ X. OR 0.65X/X = 0.65. We need to find 10.65 = 0.35 or 35%.



Manager
Joined: 28 May 2014
Posts: 52

Re: In GoshawkEurasian nature reserve 30 percent of the birds
[#permalink]
Show Tags
26 Jul 2014, 22:11
Hi Smyarga,
Can you please explain what " If there are 25 percent as many Kingfishers as PaddyfieldWarblers" means? Though i got the ans right, didnt get the clarity of the above phrase. Thanks in advance.



Math Expert
Joined: 02 Sep 2009
Posts: 54544

Re: In GoshawkEurasian nature reserve 30 percent of the birds
[#permalink]
Show Tags
27 Jul 2014, 17:51
sri30kanth wrote: Hi Smyarga,
Can you please explain what " If there are 25 percent as many Kingfishers as PaddyfieldWarblers" means? Though i got the ans right, didnt get the clarity of the above phrase. Thanks in advance. This simply means that the number of Kingfishers is 25% of the number of PaddyfieldWarblers.
_________________



Manager
Joined: 28 May 2014
Posts: 52

Re: In GoshawkEurasian nature reserve 30 percent of the birds
[#permalink]
Show Tags
28 Jul 2014, 09:30
Thanks for the explanation



SVP
Status: The Best Or Nothing
Joined: 27 Dec 2012
Posts: 1813
Location: India
Concentration: General Management, Technology
WE: Information Technology (Computer Software)

Re: In GoshawkEurasian nature reserve 30 percent of the birds
[#permalink]
Show Tags
01 Aug 2014, 00:37
For total Birds = 100 Hawks = 30 Non Hawks = 100  30 =70 40% of Non Hawks are Paddy = 28 25% of Paddy are King = 7 Remaining (Non Hawk, Non Paddy, Non King) = 100  (30 + 28 + 7) = 35 Answer = B
_________________
Kindly press "+1 Kudos" to appreciate



Moderator
Joined: 22 Jun 2014
Posts: 1112
Location: India
Concentration: General Management, Technology
GPA: 2.49
WE: Information Technology (Computer Software)

Re: In GoshawkEurasian nature reserve 30 percent of the birds
[#permalink]
Show Tags
29 Apr 2016, 09:45
bagdbmba wrote: In GoshawkEurasian nature reserve 30 percent of the birds are Hawks, and 40 percent of the nonHawks are PaddyfieldWarblers. If there are 25 percent as many Kingfishers as PaddyfieldWarblers in the reserve, then what percent of the birds in the nature reserve are not Hawks, PaddyfieldWarblers, or Kingfishers?
A. 25% B. 35% C. 45% D. 70% E. 80%
P.S: Bunuel/KarishmaCan you please come up with a detail explanation for the solution. And is it a 700+ problem? I doubt although... Total birds = 100 hawks = 30 Non hawks = 70 Paddy = 40% of 70 = 28 Kingfisher = 25% of paddy = 25% of 28 = 7 Hawks + paddy + kingfisher = 65 birds in the nature reserve are not Hawks, PaddyfieldWarblers, or Kingfishers = 100 – 65 = 35
_________________



Director
Joined: 12 Nov 2016
Posts: 725
Location: United States
GPA: 2.66

Re: In GoshawkEurasian nature reserve 30 percent of the birds
[#permalink]
Show Tags
23 Jun 2017, 18:21
bagdbmba wrote: In GoshawkEurasian nature reserve 30 percent of the birds are Hawks, and 40 percent of the nonHawks are PaddyfieldWarblers. If there are 25 percent as many Kingfishers as PaddyfieldWarblers in the reserve, then what percent of the birds in the nature reserve are not Hawks, PaddyfieldWarblers, or Kingfishers?
A. 25% B. 35% C. 45% D. 70% E. 80%
P.S: Bunuel/KarishmaCan you please come up with a detail explanation for the solution. And is it a 700+ problem? I doubt although... To solve this question you could just use a simple number 100(.30)= 30 Hawk 100(.70)(.40) =28 PaddyfieldWarbler 28(1/4) =7 Kingfisher 30 + 28 +7= 65 10065= 35 Thus "B"



Manager
Joined: 02 Feb 2016
Posts: 88

Re: In GoshawkEurasian nature reserve 30 percent of the birds
[#permalink]
Show Tags
07 Sep 2017, 13:22
"40 percent of the nonHawks are PaddyfieldWarblers. If there are 25 percent as many Kingfishers as PaddyfieldWarblers in the reserve" When we talk about 40% of the nonhawks, then shouldn't we consider PaddyfieldWarblers as a percentage within the nonHawks rather than the total PaddyfieldWarblers? It's confusing the way it has been written. Can someone provide some clarity? abhimahna



Board of Directors
Status: Stepping into my 10 years long dream
Joined: 18 Jul 2015
Posts: 3632

Re: In GoshawkEurasian nature reserve 30 percent of the birds
[#permalink]
Show Tags
09 Sep 2017, 01:56
TheMastermind wrote: "40 percent of the nonHawks are PaddyfieldWarblers. If there are 25 percent as many Kingfishers as PaddyfieldWarblers in the reserve" When we talk about 40% of the nonhawks, then shouldn't we consider PaddyfieldWarblers as a percentage within the nonHawks rather than the total PaddyfieldWarblers? It's confusing the way it has been written. Can someone provide some clarity? abhimahnaHi TheMastermind , Here I go: Total Birds = 100x Hawks = 30x Non Hawks = 70x Paddy = 28x Kingfisher = 7x There total birds which are either Hawks, Paddy or Kingfisher = 30x = 28x + 7x = 65x Hence, birds which are neither of these = 35x or 35%. If you see my solution, I considered "PaddyfieldWarblers as a percentage within the nonHawks" and this is correct. I am not sure what made you confused. You should not assume that hawks may also have some paddy unless not given Does that make sense?
_________________
My GMAT Story: From V21 to V40My MBA Journey: My 10 years long MBA DreamMy Secret Hacks: Best way to use GMATClub  Importance of an Error Log!Verbal Resources: All SC Resources at one place  All CR Resources at one placeBlog: Subscribe to Question of the Day BlogGMAT Club Inbuilt Error Log Functionality  View More. New Visa Forum  Ask all your Visa Related Questions  here. New! Best Reply Functionality on GMAT Club!Find a bug in the new email templates and get rewarded with 2 weeks of GMATClub Tests for freeCheck our new About Us Page here.




Re: In GoshawkEurasian nature reserve 30 percent of the birds
[#permalink]
09 Sep 2017, 01:56






