Question 21:

• JAMB 2019

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. \(\frac{1}{2}\)

Question 22:

• JAMB 2019

Find the length of the chord |AB| in the diagram shown above.

A. 4.2 cm
B. 4.3 cm
C. 3.2 cm
D. 3.4 cm

Question 23:

• JAMB 2019

In how many ways can the word MATHEMATICIAN be arranged?

A. 6794800 ways
B. 2664910 ways
C. 6227020800 ways
D. 129729600 ways

Question 24:

• JAMB 2019

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. \(\begin{vmatrix} -4 & 0 & 8 \\ 0 & -2 & -16 \\ 10 & 12 & 6 \end{vmatrix}\)

Question 25:

• JAMB 2019

From the cyclic quadrilateral MNOP above, find the value of x.

A. 16°
B. 25°
C. 42°
D. 39°