\(\begin{array}{c|c} \text{Age in years} & 10 & 11 & 12 \\ \hline \text{Number of pupils}...
MATHEMATICS
JAMB 1994
\(\begin{array}{c|c} \text{Age in years} & 10 & 11 & 12 \\ \hline \text{Number of pupils} & 6 & 27 & 7\end{array}\)
The table above shows the number of pupils in each age group in a class. What is the probability that a pupil chosen at random is at least 11 years old?
- A. \(\frac{27}{40}\)
- B. \(\frac{17}{20}\)
- C. \(\frac{33}{40}\)
- D. \(\frac{3}{20}\)
Correct Answer: B. \(\frac{17}{20}\)
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