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

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Manager
Joined: 19 Aug 2009
Posts: 77
Of the teams competing in the world archery championships, twenty perc  [#permalink]

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20 Aug 2009, 14:48
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Difficulty:

45% (medium)

Question Stats:

71% (01:58) correct 29% (02:36) wrong based on 229 sessions

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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
Manager
Joined: 14 Aug 2009
Posts: 94
Re: Of the teams competing in the world archery championships, twenty perc  [#permalink]

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20 Aug 2009, 21:14
1
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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Schools: NUS, NTU, SMU, AGSM, Melbourne School of Business
Re: Of the teams competing in the world archery championships, twenty perc  [#permalink]

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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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Joined: 09 Aug 2009
Posts: 33
Re: Of the teams competing in the world archery championships, twenty perc  [#permalink]

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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
Intern
Joined: 18 Dec 2010
Posts: 2
Re: Of the teams competing in the world archery championships, twenty perc  [#permalink]

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02 Jan 2011, 21:13
1
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.
Manager
Joined: 18 Oct 2010
Posts: 62
Re: Of the teams competing in the world archery championships, twenty perc  [#permalink]

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03 Jan 2011, 21:39
this question is not clearly. half of as many... ?
as many of what?
Manager
Joined: 09 Jun 2015
Posts: 88
Re: Of the teams competing in the world archery championships, twenty perc  [#permalink]

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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]

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23 Jan 2018, 08:59
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.

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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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