csat-suneung 2011 Q7

csat-suneung · South-Korea · csat__math-science 3 marks Probability Definitions Probability Using Set/Event Algebra
Chulsu participated in a certain design competition. Participants receive scores in two categories, and the possible scores in each category are one of three types shown in the table. The probability that Chulsu receives score A in each category is $\frac { 1 } { 2 }$, the probability of receiving score B is $\frac { 1 } { 3 }$, and the probability of receiving score C is $\frac { 1 } { 6 }$. When the event of receiving an audience vote score and the event of receiving a judge score are independent, what is the probability that the sum of the two scores Chulsu receives is 70? [3 points]
CategoryScore AScore BScore C
Audience Vote403020
Judge504030

(1) $\frac { 1 } { 3 }$
(2) $\frac { 11 } { 36 }$
(3) $\frac { 5 } { 18 }$
(4) $\frac { 1 } { 4 }$
(5) $\frac { 2 } { 9 }$
Chulsu participated in a certain design competition. Participants receive scores in two categories, and the possible scores in each category are one of three types shown in the table. The probability that Chulsu receives score A in each category is $\frac { 1 } { 2 }$, the probability of receiving score B is $\frac { 1 } { 3 }$, and the probability of receiving score C is $\frac { 1 } { 6 }$. When the event of receiving an audience vote score and the event of receiving a judge score are independent, what is the probability that the sum of the two scores Chulsu receives is 70? [3 points]

\begin{center}
\begin{tabular}{ | c | c | c | c | }
\hline
Category & Score A & Score B & Score C \\
\hline
Audience Vote & 40 & 30 & 20 \\
\hline
Judge & 50 & 40 & 30 \\
\hline
\end{tabular}
\end{center}

(1) $\frac { 1 } { 3 }$\\
(2) $\frac { 11 } { 36 }$\\
(3) $\frac { 5 } { 18 }$\\
(4) $\frac { 1 } { 4 }$\\
(5) $\frac { 2 } { 9 }$