Measures Of Location - Mathematics Jamb Past Questions and Answers

Question 41 :

• JAMB 1984

Thirty boys and x girls sat for a rest. The mean of the boys scores and that of the girls were respectively 6 and 8. Find x if the total scores was 468

A. 38
B. 24
C. 36
D. 22
E. 41

Question 42 :

• JAMB 1984

Measurements of the diameters, in centimeters, in centimeters, of 20 copper spheres are distributed as shown below
\(\begin{array}{c|c} \text{Class boundary in cm} & \text{frequency} & \\\hline 3.35 - 3.45 & 3\\ 3.45 - 3.55 & 6\\ 3.55 - 3.65 & 7\\ 3.65 - 3.75 & 4\end{array}\)
What is the mean diameter of the copper spheres?

A. 3.40cm
B. 3.58cm
C. 3.56cm
D. 3.62cm

Question 43 :

• JAMB 1985

The number of goals scored by a football team in 20 matches is shown below
\(\begin{array}{c|c} \text{No. of goals} & 0 & 1 & 2 & 3 & 4 & 5 \\ \hline \text{No. of matches} & 3 & 5 & 7 & 3 & 1 & 0 \end{array}\)
What are the values of the mean and the mode respectively?

A. (1.75, 5)
B. (1.75, 2)
C. (1.75, 1)
D. (65, 74)

Question 44 :

• JAMB 1986

If Musa scored 75 in biology instead of 57, his average mark in four subjects would have been 60. What was his total mark?

A. 282
B. 240
C. 222
D. 210

Question 45 :

• JAMB 1986

Find the median of the numbers 89, 141, 130, 161, 120, 131, 131, 100, 108 and 119

A. 131
B. 125
C. 123
D. 120