[tex]\huge\color{IRON}\{\boxed{\tt{ANSWER:}}[/tex]
[tex]A.) Either \: x \: or \: y \: wins = P ( x \: or \: y ) = \: \frac{11}{30} [/tex]
[tex]B.) Neither \: x \: or \: z \: wins = P ( x \: or \: z ) = \frac{7}{15} [/tex]
