Jamb Mathematics Past Questions and Answers

Question 706:

• JAMB 1982

Determine the mean monthly salary of 50 employees of a company from the following frequency distribution.
\(\begin{array}{c|c} \text{Monthly salary} & \text{Frequency}\\\hline N200.00 & 10\\ N325.00 & 5\\N100.00 & 20\\N120.00 & 2\\ N60.00 & 10\\ N80.00 & 3\end{array}\)

A. N215.30
B. N134.10
C. N143.10
D. N80.00
E. N50.30

Question 707:

• JAMB 1982

If the function y = 5x is graphed, what would be its intercept on the y-axis?

A. 5
B. \(\frac{1}{5}\)
C. 1
D. 2
E. Zero

Question 708:

• JAMB 1982

A side of a rhombus is 2cm in length. An angle of the rhombus is 60^o. What is the length of the diagonal facing this angle?

A. 2cm
B. 8cm
C. 4cm
D. 2\(\sqrt{3}\)cm
E. 16cm

Question 709:

• JAMB 1982

A variable y is inversely proportional to x², when y = 10, x = 2. What is y when x = 10?

A. 2
B. 4
C. 100
D. 0.4
E. 0.1

Question 710:

• JAMB 1982

Two distinct sectors i the same circle substend 100^o and 30^o respectively at the centre of the circle. Their corresponding arcs are in ratio

A. 10:3
B. 1:100
C. 3:1
D. 5:2