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Mathematics 2019 JAMB Past Questions

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11

If a fair coin is tossed 3 times, what is the probability of getting at least two heads?

  • A. \(\frac{2}{3}\)
  • B. \(\frac{4}{5}\)
  • C. \(\frac{2}{5}\)
  • D. \(\frac{1}{2}\)
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12

In how many ways can the word MATHEMATICIAN be arranged?

  • A. 6794800 ways
  • B. 2664910 ways
  • C. 6227020800 ways
  • D. 129729600 ways
View Answer & Discuss (8) JAMB 2019
13

Given matrix M = \(\begin{vmatrix} -2 & 0 & 4 \\ 0 & -1 & 6 \\ 5 & 6 & 3 \end{vmatrix}\), find \(M^{T} + 2M\)

  • A. \(\begin{vmatrix} -4 & 2 & 1\\ 6 & 0 & 5 \\ 0 & 6 & 2 \end{vmatrix}\)
  • B. \(\begin{vmatrix} -6 & 0 & 13\\ 0 & -3 & 18 \\ 14 & 18 & 9 \end{vmatrix}\)
  • C. \(\begin{vmatrix} 5 & 2 & 6 \\ 0 & 1 & 1\\ 3 & 4 & -7 \end{vmatrix}\)
  • D. \(\begin{vmatrix} -4 & 0 & 8 \\ 0 & -2 & -16 \\ 10 & 12 & 6 \end{vmatrix}\)
View Answer & Discuss (4) JAMB 2019
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14
Score (x) 0 1 2 3 4 5 6
Freq (f) 5 7 3 7 11 6 7

Find the mean of the data.

 

  • A. 3.26
  • B. 4.91
  • C. 6.57
  • D. 3.0
View Answer & Discuss (2) JAMB 2019
15
Score (x) 0 1 2 3 4 5 6
Freq (f) 5 7 3 7 11 6 7

Find the variance

 

  • A. 3.42
  • B. 4.69
  • C. 4.85
  • D. 3.72
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