Statistics - Mathematics Jamb Past Questions and Answers

Question 56 :

• JAMB 2015

The probability of an outcome A is 1/6 . The probability of the B outcome is 1/4 . If the probability of A or B or both is 1/12 . What is the probability of both outcomes A and B?

A. 1/2
B. 1/3
C. 2/5
D. 3/4

Question 57 :

• JAMB 2014

The mean of 2 - t, 4 + t, 3 - 2t, 2 + t and t - 1 is

A. T
B. -t
C. 2
D. -2

Question 58 :

• JAMB 2014

\(\begin{array}{c|c}
Values & 0 & 1 & 2 & 3 & 4 \\
\hline
Frequency & 1 & 2 & 2 & 1 & 9
\end{array}\)
Find the mode of the distribution above

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

Question 59 :

• JAMB 2014

Find the median of 5,9,1,10,3,8,9,2,4,5,5,5,7,3 and 6

A. 6
B. 5
C. 4
D. 3

Question 60 :

• JAMB 2014

Find the standard deviation of 5, 4, 3, 2, 1

A. \(\sqrt{2}\)
B. \(\sqrt{3}\)
C. \(\sqrt{6}\)
D. \(\sqrt{10}\)