Of the teams competing in the world archery championships, Ten 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.  Choices:
A) 13/20  B) 16/20  C) 13/15  D) 17/20  E) 13/17
Half as manymeans half of EU, then   EU 10%   US 5%   AF 5%   the rest is 50%, answer 16/20
<result>B</result>
Of the teams competing in the world archery championships, Ten 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.