Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 29 May 2017, 08:56

# Today:

Memorial Day - GMAT Club Tests are Open without Subscription

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# When a planetary system forms, the chances that a planet

Author Message
TAGS:

### Hide Tags

SVP
Joined: 16 Jul 2009
Posts: 1536
Schools: CBS
WE 1: 4 years (Consulting)
Followers: 44

Kudos [?]: 1203 [0], given: 2

When a planetary system forms, the chances that a planet [#permalink]

### Show Tags

01 Jul 2010, 12:53
2
This post was
BOOKMARKED
00:00

Difficulty:

85% (hard)

Question Stats:

49% (02:38) correct 52% (01:41) wrong based on 200 sessions

### HideShow timer Statistics

When a planetary system forms, the chances that a planet capable of supporting life will be formed are high. The chances that a large planet the size of Jupiter or Saturn will be formed, however, are low. Without Jupiter and Saturn, whose gravitational forces have prevented Earth from being frequently struck by large comets, intelligent life would never have arisen on Earth. Since planetary systems are unlikely to contain any large planets, the chances that intelligent life will emerge on a planet are, therefore, low.
Knowing which one of the following would be most useful in evaluating the argument?
(A) whether all planetary system are formed from similar amounts of matter
(B) whether intelligent species would be likely to survive if a comet struck their planet
(C) whether large comets could be deflected by only one large planet rather than be two
(D) how high the chances are that planetary systems will contain many large comets
(E) how likely it is that planetary systems containing large planets will also contain planets the size of Earth
[Reveal] Spoiler: OA

_________________

The sky is the limit
800 is the limit

GMAT Club Premium Membership - big benefits and savings

If you have any questions
New!
Intern
Joined: 21 Apr 2010
Posts: 31
GMAT 1: 710 Q48 V40
Followers: 0

Kudos [?]: 38 [0], given: 0

Re: When a planetary system forms [#permalink]

### Show Tags

01 Jul 2010, 13:30
I remember this question when i was studying for lsat a few years ago. Could you please check the oa? I have a nagging feeling is not right.
_________________

Ps. Kudos are always welcomed ; )

VP
Joined: 15 Jul 2004
Posts: 1452
Schools: Wharton (R2 - submitted); HBS (R2 - submitted); IIMA (admitted for 1 year PGPX)
Followers: 22

Kudos [?]: 195 [0], given: 13

Re: When a planetary system forms [#permalink]

### Show Tags

01 Jul 2010, 14:43
I could easily eliminate A B and C..between D and E D is more appropriate because if the chances of comets are low, then intelligent life can survive without the existence of large planets because the latter are meant to deflect comets from striking the life-holding planet.
Intern
Joined: 21 Apr 2010
Posts: 31
GMAT 1: 710 Q48 V40
Followers: 0

Kudos [?]: 38 [0], given: 0

Re: When a planetary system forms [#permalink]

### Show Tags

01 Jul 2010, 15:43
Im sure the answer is C

If you can have 1 planet vs 2 planets for life that makes a huge difference in the chances for life.

D is tricky and tempting, but the problem is it talks about how often a large comet are in a planetary system, but thats not the same as how often a planet is struck by a large comet. D doesnt tell you anything about that frequency at all. You cant make the assumption that because there are less large comets in a planetary system , there are less collision with planets that can support life.
_________________

Ps. Kudos are always welcomed ; )

VP
Joined: 15 Jul 2004
Posts: 1452
Schools: Wharton (R2 - submitted); HBS (R2 - submitted); IIMA (admitted for 1 year PGPX)
Followers: 22

Kudos [?]: 195 [0], given: 13

Re: When a planetary system forms [#permalink]

### Show Tags

01 Jul 2010, 21:41
Detran wrote:
Im sure the answer is C

You cant make the assumption that because there are less large comets in a planetary system , there are less collision with planets that can support life.

Well you certainly can't assume so, but if there are a lot of large comets, then the "chance" of a planet being hit can be "reasonably assumed" to be high. The question is not focussing on solely on whether the chances are HIGH; but on the chance itself - whether it is high or low. Given that it is known that
1) Life bearing planets can be hit by comets
wouldn't it be "good" to evaluate the probability of finding the comets in the system - if high, then intelligent life cannot survive in the absence of the big planets meant to deflect the comets; if low, intelligent life could perhaps survive even in the absence of the large planets.
Manager
Joined: 07 Oct 2006
Posts: 71
Location: India
Followers: 2

Kudos [?]: 9 [0], given: 3

Re: When a planetary system forms [#permalink]

### Show Tags

02 Jul 2010, 03:13
Very good question... I go with dwivedys points.. But, I selected E for answer choice.
_________________

-------------------------------------

For English Grammar tips, consider visiting http://www.grammar-quizzes.com/index.html.

Intern
Joined: 21 Apr 2010
Posts: 31
GMAT 1: 710 Q48 V40
Followers: 0

Kudos [?]: 38 [0], given: 0

Re: When a planetary system forms [#permalink]

### Show Tags

02 Jul 2010, 11:14
The answers C. I looked it up in my lsat book. Nob put the wrong answer up

The chances of planet being hit because there is alot of comets do not mean anything without context. Even if there are many comets, that does not tell us anything because the chances of life depend on a large planet to block those comets.

Its the chances of these planets being formed that matters.

C directly address that issues. If one planet is sufficient it makes a huge difference on the chance for life.

imagine if the chance of a large planet is 13%

the chances of two planets is .13(.13) which is alot lower. and it makes a huge impact on the arguement.
_________________

Ps. Kudos are always welcomed ; )

Intern
Joined: 25 Jun 2010
Posts: 25
Followers: 0

Kudos [?]: 2 [0], given: 4

Re: When a planetary system forms [#permalink]

### Show Tags

02 Jul 2010, 13:55
the answer is D. The only threat to life being sustained is comets slamming into the planets. If there are no comets in the new planetary systems, there will be no need for large planets.
Intern
Joined: 21 Apr 2010
Posts: 31
GMAT 1: 710 Q48 V40
Followers: 0

Kudos [?]: 38 [0], given: 0

Re: When a planetary system forms [#permalink]

### Show Tags

02 Jul 2010, 14:09
You cant say there is a 0 chance of having large comet in the system. It contradicts the passage
_________________

Ps. Kudos are always welcomed ; )

Manager
Joined: 27 Mar 2010
Posts: 124
Followers: 2

Kudos [?]: 11 [0], given: 17

Re: When a planetary system forms [#permalink]

### Show Tags

04 Jul 2010, 12:41
IMO D
SVP
Joined: 17 Feb 2010
Posts: 1507
Followers: 19

Kudos [?]: 630 [0], given: 6

Re: When a planetary system forms [#permalink]

### Show Tags

07 Jul 2010, 18:35
I like D too.
Manager
Joined: 24 Jan 2010
Posts: 157
Location: India
Schools: ISB
Followers: 2

Kudos [?]: 58 [0], given: 14

Re: When a planetary system forms [#permalink]

### Show Tags

08 Jul 2010, 02:31
I am in with D
_________________

_________________
If you like my post, consider giving me a kudos. THANKS!

Senior Manager
Joined: 23 May 2010
Posts: 429
Followers: 5

Kudos [?]: 118 [0], given: 112

Re: When a planetary system forms [#permalink]

### Show Tags

10 Jul 2010, 22:48
D
Manager
Joined: 09 Jul 2010
Posts: 145
Followers: 1

Kudos [?]: 29 [0], given: 3

Re: When a planetary system forms [#permalink]

### Show Tags

11 Jul 2010, 21:50
D
_________________

consider cudos if you like my post

Manager
Joined: 25 Aug 2008
Posts: 224
Location: India
WE 1: 3.75 IT
WE 2: 1.0 IT
Followers: 2

Kudos [?]: 64 [0], given: 5

Re: When a planetary system forms [#permalink]

### Show Tags

12 Jul 2010, 00:37
My choice is D.
_________________

Cheers,
Varun

If you like my post, give me KUDOS!!

Manager
Joined: 24 May 2010
Posts: 67
Followers: 1

Kudos [?]: 21 [0], given: 4

Re: When a planetary system forms [#permalink]

### Show Tags

12 Jul 2010, 06:03
D for me too
Senior Manager
Joined: 12 Jan 2010
Posts: 257
Schools: DukeTuck,Kelogg,Darden
Followers: 6

Kudos [?]: 82 [0], given: 28

Re: When a planetary system forms [#permalink]

### Show Tags

12 Jul 2010, 09:23
I would have gone with D but then the passage doesnt say anything about how many comets are required to destroy life.........
_________________

Run towards the things that make you uncomfortable daily. The greatest risk is not taking risks
http://gmatclub.com/forum/from-690-to-730-q50-v38-97356.html

Manager
Joined: 16 Jun 2010
Posts: 165
Followers: 3

Kudos [?]: 47 [0], given: 1

Re: When a planetary system forms [#permalink]

### Show Tags

13 Jul 2010, 01:52
D.
_________________

R E S P E C T

Finally KISSedGMAT 700 times 450 to 700 An exprience

Manager
Joined: 08 Jan 2010
Posts: 185
Followers: 1

Kudos [?]: 3 [0], given: 13

Re: When a planetary system forms [#permalink]

### Show Tags

02 Aug 2010, 14:32
completely lost .........
Manager
Joined: 01 Jul 2010
Posts: 51
Schools: LBS, Harvard, Booth, Stanford, ISB, NTU
WE 1: S/W Engineer
Followers: 0

Kudos [?]: 49 [0], given: 15

Re: When a planetary system forms [#permalink]

### Show Tags

05 Aug 2010, 00:17
What's the OA? I'm completely lost...
Re: When a planetary system forms   [#permalink] 05 Aug 2010, 00:17

Go to page    1   2    Next  [ 34 posts ]

Similar topics Replies Last post
Similar
Topics:
7 Because there are no habitable planets other than Earth in 7 11 Apr 2016, 19:25
The rapid diminishment of the ecosystem of the Amazon threatens the entire planet 3 03 Jul 2012, 12:00
7 Measurements of the motion of the planet Uranus seem to show 18 09 Sep 2015, 04:09
59 When a planetary system forms, the chances that a planet 43 21 Aug 2016, 15:56
7 Planetary bodies differ from one another in their 7 31 Jul 2016, 02:00
Display posts from previous: Sort by