The given quadratic equation 3x² + $\sqrt{7}$ x + 2 = 0 has:

1. two equal real roots.

2. two distinct real roots.

3. more than two real roots.

4. no real roots.

Which of the following cannot be the probability of any event:

1. $\dfrac{5}{4}$

2. 0.25

3. $\dfrac{1}{33}$

4. 67%.

The equation of the line passing through origin and parallel to the line 3x + 4y + 7 = 0 is:

1. 3x + 4y + 5 = 0

2. 4x - 3y - 5 = 0

3. 4x - 3y = 0

4. 3x + 4y = 0

If $A = \begin{bmatrix$}[r] 0 & 1 \ 1 & 0 \end{bmatrix}, then A² is equal to:

1. $\begin{bmatrix$}[r] 1 & 1 \ 0 & 0 \end{bmatrix}

2. $\begin{bmatrix$}[r] 0 & 0 \ 1 & 1 \end{bmatrix}

3. $\begin{bmatrix$}[r] 1 & 0 \ 0 & 1 \end{bmatrix}

4. $\begin{bmatrix$}[r] 0 & 1 \ 1 & 0 \end{bmatrix}