Measures of Location - Jamb Mathematics Past Questions and Answers

Question 51:

• JAMB 1989

If n is the median and m is the mode of the following set of numbers, 2.4, 2.1, 1.6, 2.6, 2.6, 3.7, 2.1, 2.6, then (n, m) is

A. (2.6, 2.6)
B. (2.5, 2.6)
C. (2.6, 2.5)
D. (2.5, 2.1)

Question 52:

• JAMB 1990

The mean of ten positive numbers is 16. When another number is added, the mean becomes 18. Find the eleventh number

A. 3
B. 16
C. 18
D. 38

Question 53:

• JAMB 1990

Below are the scores of a group of students in a test
\(\begin{array}{c|c} Scores & 1 & 2 & 3 & 4 & 5 & 6 \\ \hline \text{No. of students} & 1 & 4 & 5 & 6 & x & 2\end{array}\)
If the average scores is 3.5, find the value of x

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

Question 54:

• JAMB 1991

Fifty boxes each of 50 bolts were inspected for the number which were defective. The following was the result
\(\begin{array}{c|c} \text{No. defective per box} & 4 & 5 & 6 & 7 & 8 & 9 \\ \hline \text{No. of boxes} & 2 & 7 & 17 & 10 & 8 & 6\end{array}\)
The mean and the median of the distribution are respectively

A. 6.7, 6
B. 7.6, 5
C. 5.7, 87
D. 34, 6

Question 55:

• JAMB 1992

\(\begin{array}{c|c} x & 2 & 4 & 6 & 8\\ \hline f & 4 & y & 6 & 5 \end{array}\)
If the mean of the above frequency distribution is 5.2, find y

A. 2, 1
B. 1, 2
C. 1, 5
D. 5, 2