|
Author |
Message |
|
TAGS:
|
|
|
Manager
Joined: 18 Oct 2009
Posts: 53
Schools: Kellogg
Followers: 33
Kudos [?]:
257
[0], given: 3
|
On average, the bottle-nosed dolphin comes up for air once [#permalink]
 24 Oct 2009, 20:55
Question Stats:
62% (02:37) correct
37% (01:11) wrong based on 2 sessions
On average, the bottle-nosed dolphin comes up for air once every two minutes; the beluga whale, a close relative, comes up for air on average once every five minutes. The number of times a bottle-nosed dolphin would come up for air in a 24 hour period is approximately what percent greater than the number of times a beluga whale would come up for air in that same period? A. 50% B. 100% C. 150% D. 200% E. 250% One question I have is how to interpret a statement like the following: "X's height is 110% greater than that of Y." Does that mean X = 1.10*Y or X = 2.10*Y?
_________________
GMAT Strategies: slingfox-s-gmat-strategies-condensed-96483.html
|
|
|
|
|
|
|
Senior Manager
Joined: 18 Aug 2009
Posts: 340
Followers: 5
Kudos [?]:
120
[0], given: 13
|
Re: Percentage Problem, Word Translation Issue [#permalink]
24 Oct 2009, 21:01
30*24-12*24/12*24=30-12/12=18/12
So 150%, Answer is C.
|
|
|
|
|
|
GMAT Club team member
Joined: 02 Sep 2009
Posts: 11515
Followers: 1791
Kudos [?]:
9533
[2] , given: 826
|
Re: Percentage Problem, Word Translation Issue [#permalink]
24 Oct 2009, 21:07
2
This post received
KUDOS
On average, the bottle-nosed dolphin comes up for air once every two minutes; the beluga whale, a close relative, comes up for air on average once every five minutes. The number of times a bottle-nosed dolphin would come up for air in a 24 hour period is approximately what percent greater than the number of times a beluga whale would come up for air in that same period? A. 50% B. 100% C. 150% D. 200% E. 250% Dolphin once in 2 min; Beluga once in 5 min; So, dolphin comes up 2.5 times frequently than beluga, which is 150% (5-2)/2*100. "X's height is 110% greater than that of Y." Means: x=(1+110%)*y=(1+1.1)*y=2.1*y
_________________
PLEASE READ AND FOLLOW: 11 Rules for Posting!!!
RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory
COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. NEW!!!
DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set. NEW!!!
What are GMAT Club Tests?
25 extra-hard Quant Tests
Find out what's new at GMAT Club - latest features and updates
|
|
|
|
|
|
Manager
Joined: 18 Oct 2009
Posts: 53
Schools: Kellogg
Followers: 33
Kudos [?]:
257
[0], given: 3
|
Re: Percentage Problem, Word Translation Issue [#permalink]
25 Oct 2009, 02:10
Thanks guys. The OA is indeed C. Thanks for the word translation help Bunuel. I just wanted to make sure I am interpreting wording correctly (I keep confusing myself unfortunately!).
_________________
GMAT Strategies: slingfox-s-gmat-strategies-condensed-96483.html
|
|
|
|
|
|
Director
Status: Preparing for the 4th time -:(
Joined: 25 Jun 2011
Posts: 558
Location: United Kingdom
Concentration: International Business, Strategy
GMAT Date: 06-22-2012
GPA: 2.9
WE: Information Technology (Consulting)
Followers: 8
Kudos [?]:
61
[0], given: 212
|
On average, the bottle-nosed dolphin comes up for air once every two minutes; the beluga whale, a close relative, comes up for air on average once every five minutes. The number of times a bottle-nosed dolphin would come up for air in a 24 hour period is approximately what percent greater than the number of times a beluga whale would come up for air in that same period? 1.50% 2.100% 3.150% 4.200% 5. 250% I got 250%. But that's incorrect. The correct answer is c [150%]. Can someone help please?
_________________
Best Regards,
E.
MGMAT 1 --> 530
MGMAT 2--> 640
MGMAT 3 ---> 610 
|
|
|
|
|
|
Manager
Status: Quant 50+?
Joined: 02 Feb 2011
Posts: 109
Concentration: Strategy, Finance
Followers: 1
Kudos [?]:
21
[3] , given: 22
|
3
This post received
KUDOS
enigma123 wrote: On average, the bottle-nosed dolphin comes up for air once every two minutes; the beluga whale, a close relative, comes up for air on average once every five minutes. The number of times a bottle-nosed dolphin would come up for air in a 24 hour period is approximately what percent greater than the number of times a beluga whale would come up for air in that same period?
1.50%
2.100%
3.150%
4.200%
5. 250%
I got 250%. But that's incorrect. The correct answer is c [150%]. Can someone help please? Key wording is percent greater. 5/2 = 2.5 = 250%, but the dolphin obviously comes up 100% of itself, thus we have to subtract the 100%. Consider this. I scored 500 on my gmat, you scored 600. What percent greater did you score? Answer is 20%, however if I said "your score is what percent of my score?" the answer would be 120%. Be careful!
|
|
|
|
|
|
Manager
Joined: 12 Oct 2011
Posts: 136
GMAT 1: 700 Q48 V37
GMAT 2: 720 Q48 V40
Followers: 2
Kudos [?]:
36
[0], given: 23
|
On average, the bottle-nosed dolphin comes up for air once [#permalink]
17 Apr 2012, 10:04
On average, the bottle-nosed dolphin comes up for air once every two minutes; the beluga whale, a close relative, comes up for air on average once every five minutes. The number of times a bottle-nosed dolphin would come up for air in a 24 hour period is approximately what percent greater than the number of times a beluga whale would come up for air in that same period?
A) 50%
B) 100%
C) 150%
D) 200%
E) 250%
This question asks for the percentage change, but I don't see what forumulation asks that in the question? I don't see which words indicate that not the percentage of bottle-nosen dolphins to beluga whales is looked for. Could anybody help me with the formulation in these kinds of problems, I sometimes get these problems wrong because I misunderstand what's looked for in the question.
|
|
|
|
|
|
Manager
Joined: 19 Mar 2012
Posts: 156
Location: United States
Concentration: Finance, General Management
GPA: 3.69
WE: Analyst (Mutual Funds and Brokerage)
Followers: 0
Kudos [?]:
8
[0], given: 12
|
Re: On average, the bottle-nosed dolphin comes up for air once [#permalink]
17 Apr 2012, 12:04
BN1989 wrote: On average, the bottle-nosed dolphin comes up for air once every two minutes; the beluga whale, a close relative, comes up for air on average once every five minutes. The number of times a bottle-nosed dolphin would come up for air in a 24 hour period is approximately what percent greater than the number of times a beluga whale would come up for air in that same period?
A) 50%
B) 100%
C) 150%
D) 200%
E) 250%
This question asks for the percentage change, but I don't see what forumulation asks that in the question? I don't see which words indicate that not the percentage of bottle-nosen dolphins to beluga whales is looked for. Could anybody help me with the formulation in these kinds of problems, I sometimes get these problems wrong because I misunderstand what's looked for in the question. These percentage questions confused me too at a point, but the formula is pretty simple: x = y(1+P) where x is your first item (number of times dolphin comes up), y is your second item (number of times whale comes up), and p is your percentage chain. If I ever forget the formula, what I do is use the simple fact that I 3 is 50% greater than 2, or 2 is 100% greater than 1. That way I don't confuse which number goes where 3=2(1+.5) But anyways, back to the problem: x = y(1+P) x = once every two minutes, or 5 times every ten minutes y = one every five minutes, or 2 times every ten minutes 5 = 2(1+P) P = 1.5 = 150% so the answer is C.
|
|
|
|
|
|
GMAT Club team member
Joined: 02 Sep 2009
Posts: 11515
Followers: 1791
Kudos [?]:
9533
[0], given: 826
|
Re: On average, the bottle-nosed dolphin comes up for air once [#permalink]
17 Apr 2012, 12:23
BN1989 wrote: On average, the bottle-nosed dolphin comes up for air once every two minutes; the beluga whale, a close relative, comes up for air on average once every five minutes. The number of times a bottle-nosed dolphin would come up for air in a 24 hour period is approximately what percent greater than the number of times a beluga whale would come up for air in that same period?
A) 50%
B) 100%
C) 150%
D) 200%
E) 250%
This question asks for the percentage change, but I don't see what forumulation asks that in the question? I don't see which words indicate that not the percentage of bottle-nosen dolphins to beluga whales is looked for. Could anybody help me with the formulation in these kinds of problems, I sometimes get these problems wrong because I misunderstand what's looked for in the question. Merging similar topics. Please ask if anything remains unclear.
_________________
PLEASE READ AND FOLLOW: 11 Rules for Posting!!!
RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory
COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. NEW!!!
DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set. NEW!!!
What are GMAT Club Tests?
25 extra-hard Quant Tests
Find out what's new at GMAT Club - latest features and updates
|
|
|
|
|
|
Intern
Joined: 19 Apr 2012
Posts: 25
Followers: 0
Kudos [?]:
1
[0], given: 8
|
Re: On average, the bottle-nosed dolphin comes up for air once [#permalink]
01 Aug 2012, 15:04
Is this really a 600 - 700 question ? not sub 600 ?
|
|
|
|
|
|
|
Re: On average, the bottle-nosed dolphin comes up for air once
[#permalink]
01 Aug 2012, 15:04
|
|
|
|
|
|
|
|
|
|
|
close
