Resposta :
Brasileiros:
[tex]\dfrac{9}{9+6+4}=\dfrac{9}{19}[/tex]
Ingleses:
[tex]\dfrac{6}{9+6+4}=\dfrac{6}{19}[/tex]
Argentinos:
[tex]\dfrac{4}{9+6+4}=\dfrac{4}{19}[/tex]
[tex]\dfrac{9}{9+6+4}=\dfrac{9}{19}[/tex]
Ingleses:
[tex]\dfrac{6}{9+6+4}=\dfrac{6}{19}[/tex]
Argentinos:
[tex]\dfrac{4}{9+6+4}=\dfrac{4}{19}[/tex]
Brasileiros: 9+6+4=19=9/19
Ingleses: 9+6+4=19=9/19
Argentinos: 9+6+4=19=9/19