The table above gives the marks scored by a group of students in a test Use the table to answer the Question below
What is the probability of selecting a student from the group that scored 2 or 3?
- \(\frac{1}{11}\)
- \(\frac{5}{22}\)
- \(\frac{7}{22}\)
-
\(\frac{6}{11}\)
The correct answer is: D
Explanation
Prob (2 or 3) = prob(2) + prob(3)Prob (mark 2) \(=\frac{7}{22}\) + Prob(mark 3) = \(\frac{5}{22}\)
Prob(2 or 3) \(=\frac{7}{22}+\frac{5}{22}=\frac{12}{22}=\frac{6}{11}\)