MATHEMATICS
JAMB 2009 - Question 50
Mathematics 2009 JAMB Past Questions - Question 50: The table above shows the distribution of marks of students in a test.Find the probability of passing the test if the pass mark is 5. Marks 2 3 4 5 6 7 8 9 No of student 3 4 1 0 4 5 2 1
A:
B:
C:
D:
Correct Answer
A
Explanation
p (pass at 5 mark) = 12/20 = 3/5To find the probability of passing the test if the pass mark is 5, we need to sum up the number of students who scored 5 or higher and divide it by the total number of students.In the given table, the number of students who scored 5 or higher is 4 + 5 + 2 = 11.The total number of students is 3 + 4 + 1 + 0 + 4 + 5 + 2 = 19.Therefore, the probability of passing the test if the pass mark is 5 is 11/19.
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