Statistics - Mathematics Jamb Past Questions and Answers

Question 36 :

• JAMB 2019

Marks	1	2	3	4	5
Frequency	2y - 2	y - 1	3y - 4	3 - y	6 - 2y

The table above is the distribution of data with mean equals to 3. Find the value of y.

A. 5
B. 2
C. 3
D. 6

Question 37 :

• JAMB 2018

The probabilities that John and James pass an examination are \(\frac {3}{4}\)and \(\frac {3}{5}\) respectively. Find the probability of both boys failing the examination.


A. \(\frac {1}{10}\)
B. \(\frac {2}{10}\)
C. \(\frac {9}{20}\)
D. \(\frac {11}{20}\)

Question 38 :

• JAMB 2018

The table shown gives the marks scored by a group of student in a test. Use the table to answer the question given.

Mark	0	1	2	3	4	5
Frequency	1	2	7	5	4	3

What is the median mark?

A. 1
B. 2
C. 3
D. 4

Question 39 :

• JAMB 2018

The table shown gives the marks scored by a group of student in a test. Use the table to answer the question given.

Mark	0	1	2	3	4	5
Frequency	1	2	7	5	4	3

What is the probability of selecting a student from the group that scored 2 or 3

A. \(\frac{1}{11}\)
B. \(\frac{5}{22}\)
C. \(\frac{7}{22}\)
D. \(\frac{6}{11}\)

Question 40 :

• JAMB 2018

Use the quadratic equation curve to answer this questions
What is the minimum value of the graph?

A. -5.3
B. 0.5
C. 3
D. 8