Representation of data - Jamb Mathematics Past Questions and Answers

Question 16:

• JAMB 2013

The graph above is correctly represented by

A. Y = x² - x - 2
B. Y = x² - 3x + 2
C. Y = x² - x - 1
D. Y = x² + x - 2

Question 17:

• JAMB 2013

The bar chart above shows the allotment of time(in minutes) per week for selected subjects in a certain school.

What is the total time allocated to the six subjects per week?

A. 460mins
B. 720mins
C. 960mins
D. 200mins

Question 18:

• JAMB 2013

The pie chart above shows the statistical distribution of 80 students in five subjects in an examination.

Calculate how many student offer Mathematics.

A. 30
B. 11
C. 50
D. 20

Question 19:

• JAMB 1979

The following table relates the number of objects f corresponding to a certain size x. What is the average size of an object?
\(\begin{array}{c|c} f & 1 & 2 & 3 & 4 & 5 \\ \hline x & 1 & 2 & 4 & 8 & 16\end{array}\)

A. \(\frac{31}{15}\)
B. \(\frac{31}{5}\)
C. \(\frac{129}{5}\)
D. \(\frac{43}{5}\)
E. \(\frac{16}{5}\)

Question 20:

• JAMB 1980

A set of data contains a total of 130 items which are divided into six groups for display on a pie chart. If one group contains 26 items, then the sector representing this group on the pie chart contains an angle x^o at the centre of the circle where x is

A. 36^o
B. 60^o
C. 70^o
D. 72^o
E. 75^o