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Of the teams competing in the world archery championships, twenty perc

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virtualanimosity
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Of the teams competing in the world archery championships, twenty perc [#permalink] New post   20 Aug 2009, 14:48
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Of the teams competing in the world archery championships, twenty percent are from Europe. Half as many are from the United States and one twentieth are from Africa. What fraction of teams are from neither Europe, the US or Africa.

A. 13/20
B. 15/20
C. 13/15
D. 17/20
E. 13/17
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A
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flyingbunny
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Re: Of the teams competing in the world archery championships, twenty perc [#permalink] New post   20 Aug 2009, 21:14
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virtualanimosity wrote:
1. Of the teams competing in the world archery championships, twenty percent are from Europe. Half as many are from the United States and one twentieth are from Africa. What fraction of teams are from neither Europe, the US or Africa.


A ) 13/20
B ) 15/20
C ) 13/15
D ) 17/20
E ) 13/17


Half as many means half of EU, then

EU 20%
US 10%
AF 5%

the rest is 65%, answer A
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bhanushalinikhil
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Re: Of the teams competing in the world archery championships, twenty perc [#permalink] New post   20 Aug 2009, 23:48
flyingbunny wrote:
virtualanimosity wrote:
1. Of the teams competing in the world archery championships, twenty percent are from Europe. Half as many are from the United States and one twentieth are from Africa. What fraction of teams are from neither Europe, the US or Africa.


A ) 13/20
B ) 15/20
C ) 13/15
D ) 17/20
E ) 13/17


Half as many means half of EU, then

EU 20%
US 10%
AF 5%

the rest is 65%, answer A


One Question.
How could we determine "Half as many" are of EU only. I mean I took it as half of the total teams in the event. Though the answer that I got is not on the list. But still, if someone could put some light on it.
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prabu
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Re: Of the teams competing in the world archery championships, twenty perc [#permalink] New post   20 Aug 2009, 23:57
bhanushalinikhil wrote:
flyingbunny wrote:
virtualanimosity wrote:
1. Of the teams competing in the world archery championships, twenty percent are from Europe. Half as many are from the United States and one twentieth are from Africa. What fraction of teams are from neither Europe, the US or Africa.


A ) 13/20
B ) 15/20
C ) 13/15
D ) 17/20
E ) 13/17


Half as many means half of EU, then

EU 20%
US 10%
AF 5%

the rest is 65%, answer A


One Question.
How could we determine "Half as many" are of EU only. I mean I took it as half of the total teams in the event. Though the answer that I got is not on the list. But still, if someone could put some light on it.


Ya we can't take half as many of EU.
Assume X as total then
EU=0.2X and US=0.5X and AF=0.05X
EU+US+AF+other = 1X
0.2X+0.5X+0.05X+other =1X
other = 0.25X

/Prabu
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Re: Of the teams competing in the world archery championships, twenty perc [#permalink] New post   02 Jan 2011, 21:13
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Assume 100 total people.

20% of 100 = 20 --->Europeans
1/2 of 20 ---> 10 Americans
1/20 of 100 ---> 5 Africans

Now you would add them all up, and minus it by the total (100). 100 - 35= 65. So, 65 people out of 100 are not EU, US or Africans. 65/100 is also equal to 13/20.

So therefore, the answer is A.
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diebeatsthegmat
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Re: Of the teams competing in the world archery championships, twenty perc [#permalink] New post   03 Jan 2011, 21:39
this question is not clearly. half of as many... ?
as many of what? :(
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Mathivanan Palraj
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Re: Of the teams competing in the world archery championships, twenty perc [#permalink] New post   13 Mar 2016, 07:47
virtualanimosity wrote:
Of the teams competing in the world archery championships, twenty percent are from Europe. Half as many are from the United States and one twentieth are from Africa. What fraction of teams are from neither Europe, the US or Africa.

A. 13/20
B. 15/20
C. 13/15
D. 17/20
E. 13/17

Supposing that there are 100 teams, 20 are from Europe, 10 are from the United States, and 5 are from Africa.
65 teams are from other countries. 65 out of 100 is 13/20
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Re: Of the teams competing in the world archery championships, twenty perc [#permalink] New post   23 Jan 2018, 08:59
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virtualanimosity wrote:
Of the teams competing in the world archery championships, twenty percent are from Europe. Half as many are from the United States and one twentieth are from Africa. What fraction of teams are from neither Europe, the US or Africa.

A. 13/20
B. 15/20
C. 13/15
D. 17/20
E. 13/17


We can let the total number of teams = 100

Thus, 20 are from Europe, 10 are from the US, 5 are from Africa,

So, 100 - 20 - 10 - 5 = 65 are from neither Europe, the US or Africa, which is 65/100 = 13/20.

Answer: A
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Re: Of the teams competing in the world archery championships, twenty perc [#permalink]
23 Jan 2018, 08:59
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