Probability - Mathematics Jamb Past Questions and Answers

Question 6 :

• JAMB 2018

How many children are in the hospital

A. 36
B. 40
C. 44
D. 50

Question 7 :

• 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 8 :

• 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 9 :

• JAMB 2017

If U = {x : x is an integer and 1 ≤ x ≤ 20 }
E1 = {x: x is a multiple of 3}
E2 = {x: x is a multiple of 4} and an integer is picked at random from U, find the probability that it is not in E2

A. \(\frac{3}{4}\)
B. \(\frac{3}{10}\)
C. \(\frac{1}{4}\)
D. \(\frac{1}{20}\)

Question 10 :

• 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. \(\frac {11}{20}\)