There are m boys and 12 girls in a class. What is the probability of selecting at random a girl from the class?
Answer Details
The probability of selecting a girl at random from the class is the ratio of the number of girls in the class to the total number of students in the class.
Given that there are m boys and 12 girls in the class, the total number of students in the class is m + 12. Therefore, the probability of selecting a girl at random is:
\begin{align*}
\frac{12}{m+12}
\end{align*}
Therefore, the correct option is (c) \(\frac{12}{m+12}\).