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Saturday, 15 August 2026
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Mathematics Past Questions and Answers

Topic: Measures of Dispersion

Jamb Mathematics Questions - Measures of Dispersion

Question 6:
Find the standard deviation of 5, 4, 3, 2, 1
  • A \(\sqrt{2}\)
  • B \(\sqrt{3}\)
  • C \(\sqrt{6}\)
  • D \(\sqrt{10}\)
View Answer & Explanation
Question 7:
If the variance of 3+x, 6, 4, x and 7-x is 4 and the mean is 5, find the standard deviation
  • A \(\sqrt{3}\)
  • B 2
  • C 3
  • D \(\sqrt{2}\)
View Answer & Explanation
Question 8:
If y = 2x2 + 9x - 35. Find the range of values for which y < 0.
  • A 7 < x < \(\frac{5}{2}\)
  • B -5 < 7 < x
  • C -7 < x < 5
  • D -7 < x < \(\frac{5}{2}\)
View Answer & Explanation
Question 9:
Tope bought X oranges at N5.00 each and some mangoes at N4.00 each. if she bought twice as many mangoes as oranges and spent at least N65.00 and at most N130.00, find the range of values of X.
  • A 4≤X≤5
  • B 5≤X≤8
  • C 5≤X≤10
  • D 8≤X≤10
View Answer & Explanation
Question 10:
Tope bought X oranges at N5.00 each and some mangoes at N4.00 each. if she bought twice as many mangoes as oranges and spent at least N65.00 and at most N130.00, find the range of values of X.
  • A 4≤X≤5
  • B 5≤X≤8
  • C 5≤X≤10
  • D 8≤X≤10
View Answer & Explanation