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Mathematics 1982 JAMB Past Questions

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36
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
View Answer & Discuss JAMB 1982
37
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
View Answer & Discuss JAMB 1982
38
A side of a rhombus is 2cm in length. An angle of the rhombus is 60o. What is the length of the diagonal facing this angle?
  • A. 2cm
  • B. 8cm
  • C. 4cm
  • D. 2\(\sqrt{3}\)cm
  • E. 16cm
View Answer & Discuss (4) JAMB 1982
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39

A variable y is inversely proportional to x\(^2\), when y = 10, x = 2. What is y when x = 10?

  • A. 2
  • B. 4
  • C. 100
  • D. 0.4
  • E. 0.1
View Answer & Discuss (4) JAMB 1982
40
Two distinct sectors i the same circle substend 100o and 30o 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
View Answer & Discuss (2) JAMB 1982
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