Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 06 May 2015, 02:41

### 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

# In a battle 70% of the combatants lost an eye, 80% an ear,

Author Message
TAGS:
Manager
Joined: 01 Nov 2007
Posts: 101
Followers: 1

Kudos [?]: 25 [0], given: 0

In a battle 70% of the combatants lost an eye, 80% an ear, [#permalink]  19 Mar 2008, 22:59
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
In a battle 70% of the combatants lost an eye, 80% an ear, 75% an arm, 85% a leg, x% lost all four limbs. The minimum value of x is?

Manager
Joined: 02 Mar 2008
Posts: 211
Concentration: Finance, Strategy
Followers: 1

Kudos [?]: 40 [0], given: 1

Re: PS (sets) [#permalink]  19 Mar 2008, 23:53
85%
leg is subset of 4 limbs ( i suppose ^^). So those lost 4 limbs sure lost leg
CEO
Joined: 17 Nov 2007
Posts: 3578
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 407

Kudos [?]: 2149 [0], given: 359

Re: PS (sets) [#permalink]  20 Mar 2008, 00:15
Expert's post
az780 wrote:
In a battle 70% of the combatants lost an eye, 80% an ear, 75% an arm, 85% a leg, x% lost all four limbs. The minimum value of x is?

terrible
it is a strange question...
So, 70% an eye, 80% an ear, 75% an arm, 85% a leg.

1. an eye and and an ear: p=[50%,70%]
2. (an eye and and an ear) and an arm: p=[25%,70%]
3. ((an eye and and an ear) and an arm) and a leg: p=[10%,70%]

Therefore, min: 10%, max: 70%
_________________

HOT! GMAT TOOLKIT 2 (iOS) / GMAT TOOLKIT (Android) - The OFFICIAL GMAT CLUB PREP APP, a must-have app especially if you aim at 700+ | PrepGame

SVP
Joined: 04 May 2006
Posts: 1936
Schools: CBS, Kellogg
Followers: 19

Kudos [?]: 441 [0], given: 1

Re: PS (sets) [#permalink]  20 Mar 2008, 01:15
walker wrote:
az780 wrote:
In a battle 70% of the combatants lost an eye, 80% an ear, 75% an arm, 85% a leg, x% lost all four limbs. The minimum value of x is?

terrible
it is a strange question...
So, 70% an eye, 80% an ear, 75% an arm, 85% a leg.

1. an eye and and an ear: p=[50%,70%]
2. (an eye and and an ear) and an arm: p=[25%,70%]
3. ((an eye and and an ear) and an arm) and a leg: p=[10%,70%]

Therefore, min: 10%, max: 70%

This is really funny problem. I can not stand when I read it.
Anyway, Walker! I try to but can not follow your logic! Sets always make me confused! Please give me some detail. Your approach strange also
_________________
CEO
Joined: 17 Nov 2007
Posts: 3578
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 407

Kudos [?]: 2149 [0], given: 359

Re: PS (sets) [#permalink]  20 Mar 2008, 01:39
Expert's post
sondenso wrote:
This is really funny problem. I can not stand when I read it.
Anyway, Walker! I try to but can not follow your logic! Sets always make me confused! Please give me some detail. Your approach strange also

1. Let we have two attributes: A and B.
2. Let a% of people have A and b% of people have B.
3. we will try to find max and min ab% (the percentage of people that have two attributes)

I'll try to draw:

the maximum configuration:
|aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa------------------| 100%
|bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb--------------| 100%
max=min(a,b)

the minimum configuration:
|aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa------------------| 100%
|---------------bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb| 100%
min=b-(100-a)=a+b-100. if min<0 then min have to be 0

for example, a=75%, b=87%

max=min(75%,87%)=75%
min=87%-(100%-75%)=62%
_________________

HOT! GMAT TOOLKIT 2 (iOS) / GMAT TOOLKIT (Android) - The OFFICIAL GMAT CLUB PREP APP, a must-have app especially if you aim at 700+ | PrepGame

SVP
Joined: 04 May 2006
Posts: 1936
Schools: CBS, Kellogg
Followers: 19

Kudos [?]: 441 [0], given: 1

Re: PS (sets) [#permalink]  20 Mar 2008, 18:34
walker wrote:
sondenso wrote:
This is really funny problem. I can not stand when I read it.
Anyway, Walker! I try to but can not follow your logic! Sets always make me confused! Please give me some detail. Your approach strange also

1. Let we have two attributes: A and B.
2. Let a% of people have A and b% of people have B.
3. we will try to find max and min ab% (the percentage of people that have two attributes)

I'll try to draw:

the maximum configuration:
|aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa------------------| 100%
|bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb--------------| 100%
max=min(a,b)

the minimum configuration:
|aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa------------------| 100%
|---------------bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb| 100%
min=b-(100-a)=a+b-100. if min<0 then min have to be 0

for example, a=75%, b=87%

max=min(75%,87%)=75%
min=87%-(100%-75%)=62%

Thank you Walker, you are great!
_________________
Re: PS (sets)   [#permalink] 20 Mar 2008, 18:34
Similar topics Replies Last post
Similar
Topics:
GMAT 1: Lost the battle, but I have to win the war 3 02 Jul 2013, 03:17
1 During 2001, a stock lost 80 percent of its value 2 03 Mar 2012, 20:45
%age=(Income 80 – Income70)/Income70 4 18 May 2008, 12:12
I lost my battle against GMAT - 580 ( Q 42, V 28) 7 28 Dec 2006, 08:20
Amount Earned/Day $96$84 $80$70 \$48 1 13 Apr 2006, 15:12
Display posts from previous: Sort by