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1761

\(\begin{array}{c|c} Weight(s) & 0 -10 & 10 - 20 & 20 - 30 &30 - 40 & 40 - 50\\ \hline \text{Number of coconuts} & 10 & 27 & 19 & 6 & 2\end{array}\)

Weight(g) 0-10 10-20 20-30 30-40 40-50
No. of coconuts 10 27 19 6 2

Estimate the mode of the frequency distribution above

  • A. 13.2g
  • B. 15.0g
  • C. 16.8g
  • D. 17.5g
View Answer & Discuss (2) JAMB 1993
1762
The mean of the ages of ten secondary school pupils is 16 but when the age of their teacher is added to it the men becomes 19. Find the age of the teacher
  • A. 27
  • B. 35
  • C. 38
  • D. 49
View Answer & Discuss JAMB 1993
1763
\(\begin{array}{c|c} Class & Frequency\\ \hline 1 - 5 & 2\\6 - 10 & 4\\11 - 15 & 5\\16 - 20 & 2 \\ 21 - 25 & 3\\26 - 30 & 2\\31 - 35 & 1\\36 - 40 & 1 \end{array}\)
Find the median of the observation in the table given
  • A. 11.5
  • B. 12.5
  • C. 14.0
  • D. 14.5
View Answer & Discuss (1) JAMB 1993
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1764
A number is selected at random between 20 and 30, both numbers inclusive. Find the probability that the number is a prime
  • A. \(\frac{2}{11}\)
  • B. \(\frac{5}{11}\)
  • C. \(\frac{6}{11}\)
  • D. \(\frac{8}{11}\)
View Answer & Discuss (5) JAMB 1993
1765
Calculate the standard deviation of the following data: 7, 8, 9, 10, 11, 12, 13.
  • A. 2
  • B. 4
  • C. 10
  • D. 11
View Answer & Discuss (4) JAMB 1993
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