A researcher cross-classified 386 trout into groups based on their species (all were in genus Salmo) and gender:
?
?
$$\begin{array} { | l | l | l | }
\hline \text { Species } & \text { Female } & \text { Male } \
\hline \text { Brown } & 68 & 56 \
\hline \text { Flathead } & 91 & 40 \
\hline \text { Ohrid } & 5 & 6 \
\hline \text { Sevan } & 61 & 59 \
\hline
\end{array}$$ A trout is to be selected at random. Given that the selected trout is male, what is the conditional probability that it is a Sevan trout?

Question

A researcher cross-classified 386 trout into groups based on their species (all were in genus Salmo) and gender:
?
?
$$\begin{array} { | l | l | l | } 
\hline \text { Species } & \text { Female } & \text { Male } \
\hline \text { Brown } & 68 & 56 \
\hline \text { Flathead } & 91 & 40 \
\hline \text { Ohrid } & 5 & 6 \
\hline \text { Sevan } & 61 & 59 \
\hline
\end{array}$$ A trout is to be selected at random. Given that the selected trout is male, what is the conditional probability that it is a Sevan trout?

Quizplus · Accepted Answer

The total number of male trout is 56 + 40 + 6 + 59 = 161. The number of male Sevan trout is 59. The conditional probability is 59/161 = 0.3665.

A Researcher Cross-Classified 386 Trout into Groups Based on Their