Question on: WAEC Mathematics - 2004
There are m boys and 12 girls in a class. What is the probability of selecting at random a girl from the class?
A
\(\frac{m}{12}\)
B
\(\frac{12}{m}\)
C
\(\frac{12}{m+12}\)
D
\(\frac{12}{m-12}\)
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Correct Option: C
Prob. (a girl) (=\frac{Number\hspace{1mm} of\hspace{1mm} girls}{Number \hspace{1mm} of \hspace{1mm} boys \hspace{1mm} and \hspace{1mm} girls\hspace{1mm} in \hspace{1mm} class}<br /> = \frac{12}{m+12})
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