Có đúng 1 viên bi vàng.
A.\(P\left( A \right) = \dfrac{{n\left( A \right)}}{{n\left( \Omega \right)}} = \dfrac{{10}}{{273}}\).
B.\(P\left( A \right) = \dfrac{{n\left( A \right)}}{{n\left( \Omega \right)}} = \dfrac{{8}}{{273}}\).
C.\(P\left( A \right) = \dfrac{{n\left( A \right)}}{{n\left( \Omega \right)}} = \dfrac{{10}}{{277}}\).
D.\(P\left( A \right) = \dfrac{{n\left( A \right)}}{{n\left( \Omega \right)}} = \dfrac{{8}}{{277}}\).