Statistic Jamb Mathematics Past Questions
Question 21
The number of goals scored by a football team in 20 matches is shown below
\(\begin{array}{c|c} \text{No. of goals} & 0 & 1 & 2 & 3 & 4 & 5 \\ \hline \text{No. of matches} & 3 & 5 & 7 & 4 & 1 & 0 \end{array}\)
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 22
A construction company is owned by two partners X and Y and it is agreed that their profit will be divided in the ratio 4:5. At the end of the year, Y received N5,000 more than X. What is the total profit of the company for the year?
- A. N20, 000
- B. N25,000
- C. N30,000
- D. N15,000
- E. N45, 000
Question 23
If a rod of length 250cm is measured as 255cm long in error, what is the percentage error in the measurement?
- A. 55
- B. 10
- C. 5
- D. 4
- E. 2
Question 24
In a sample survey of a University Community, the following table shows the percentage distribution of the number of members per house hold
\(\begin{array}{c|c} \text{No. of members per household} & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & \text{Total} \\ \hline \text{No. of households} & 3 & 12 & 15 & 28 & 21 & 10 & 7 & 4 & 100\end{array}\)
What is the median?
- A. 4
- B. 3
- C. 5
- D. 4.5
- E. None
Question 25
Find the mean of the following 24.57, 25.63, 24.32, 26.01, 25.77
- A. 25.12
- B. 25.30
- C. 25.26
- D. 25.50
- E. 25.75
