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4% of the population of country L has military experience

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4% of the population of country L has military experience [#permalink] New post 27 Sep 2006, 09:34
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4% of the population of country L has military experience and supports a war against country G. If 20% of those who support the war have no military experience, what % of the country's population actually supports war against G ?

a) 5
b) 7.5
c) 10
d) 12.5
e) 15

simple but i got confused in time pressure and made a mistake..!
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 [#permalink] New post 27 Sep 2006, 10:39
A 5 %


easiest for me is to pick numbers.

if 2000 = population
thank 80 has military and supports war

this 80 is 80% of total peoplutaion supporting the war so # people supporting war = 100

100 is 5% of 2000
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 [#permalink] New post 27 Sep 2006, 10:52
Got A by Plugin in the answers

Lets say the population is 100
Millitary Exp and Support war: 100*0.04=4
People with no Millitary Exp and that do not support war: (4+y)*0.2

If 5% of 100 support war then:
y=1
4+1=5 and .20(5)=1
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another way to solve it [#permalink] New post 27 Sep 2006, 11:54
if consider country population of 100 people

4 + x=y

y= supports the war
x=0.2y

so
4=0.8y, y=5
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Re: PS - military experience [#permalink] New post 27 Sep 2006, 12:13
Guys IN THE COUNTRY with military experience & pro war = 0.04

20 % of guys support war but no militrary exp.
so 80% of pro war have military experience.

People support war = 0.04*100/0.8 = 5
Re: PS - military experience   [#permalink] 27 Sep 2006, 12:13
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