Statistics - Mathematics Jamb Past Questions and Answers

Question 66 :

• JAMB 2013

The mean of seven numbers is 10. If six of the numbers are 2, 4, 8, 14, 16 and 18, find the mode.

A. 6
B. 8
C. 14
D. 2

Question 67 :

• JAMB 2013

\(\begin{array}{c|c}Age & 20 & 25 & 30 & 35 & 40 & 45 \\
\hline \text{No. of people} & 3 & 5 & 1 & 1 & 2 & 3 \end{array}\)
Calculate the median age of the frequency distribution in the table above

A. 25
B. 30
C. 35
D. 20

Question 68 :

• JAMB 2013

If the variance of 3+x, 6, 4, x and 7-x is 4 and the mean is 5, find the standard deviation

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

Question 69 :

• JAMB 2013

In how many ways can a student select 2 subjects from 5 subjects?

A. \(\frac{5!}{3!}\)
B. \(\frac{5!}{2!2!}\)
C. \(\frac{5!}{2!3!}\)
D. \(\frac{5!}{2!}\)

Question 70 :

• JAMB 2013

In how many ways can 3 seats be occupied if 5 people are willing to sit?

A. 60
B. 20
C. 5
D. 120