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Question 1 Report
Out of 70 schools, 42 of them can be attended by boys and 35 can be attended by girls. If a pupil is selected at random from these schools, find the probability that he/ she is from a mixed school.
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Question 2 Report
The marks scored by 4 students in Mathematics and Physics are ranked as shown in the table below
| Mathematics | 3 | 4 | 2 | 1 |
| Physics | 4 | 3 | 1 | 2 |
Calculate the Spearmann's rank correlation coefficient.
Question 3 Report
Given that \(a = i - 3j\) and \(b = -2i + 5j\) and \(c = 3i - j\), calculate \(|a - b + c|\).
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Question 4 Report
The general term of an infinite sequence 9, 4, -1, -6,... is \(u_{r} = ar + b\). Find the values of a and b.
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Question 5 Report
The midpoint of M(4, -1) and N(x, y) is P(3, -4). Find the coordinates of N.
Question 6 Report
Find the domain of \(g(x) = \frac{4x^{2} - 1}{\sqrt{9x^{2} + 1}}\)
Question 7 Report
If \(\overrightarrow{OX} = \begin{pmatrix} -7 \\ 6 \end{pmatrix}\) and \(\overrightarrow{OY} = \begin{pmatrix} 16 \\ -11 \end{pmatrix}\), find \(\overrightarrow{YX}\).
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Question 8 Report
A particle starts from rest and moves through a distance \(S = 12t^{2} - 2t^{3}\) metres in time t seconds. Find its acceleration in 1 second.
Question 9 Report
Find the constant term in the binomial expansion \((2x^{2} + \frac{1}{x})^{9}\)
Question 11 Report
A body of mass 28g, initially at rest is acted upon by a force, F Newtons. If it attains a velocity of \(5.4ms^{-1}\) in 18 seconds, find the value of F.
Question 12 Report
Two functions f and g are defined on the set of real numbers by \(f : x \to x^{2} + 1\) and \(g : x \to x - 2\). Find f o g.
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Question 13 Report
\(P = {1, 3, 5, 7, 9}, Q = {2, 4, 6, 8, 10, 12}, R = {2, 3, 5, 7, 11}\) are subsets of \(U = {1, 2, 3, ... , 12}\). Which of the following statements is true?
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Question 14 Report
How many numbers greater than 150 can be formed from the digits 1, 2, 3, 4, 5 without repetition?
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Question 15 Report
Find the coefficient of \(x^{3}\) in the binomial expansion of \((x - \frac{3}{x^{2}})^{9}\).
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Question 16 Report
A binary operation * is defined on the set of real numbers, by \(a * b = \frac{a}{b} + \frac{b}{a}\). If \((\sqrt{x} + 1) * (\sqrt{x} - 1) = 4\), find the value of x.
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Question 18 Report
Evaluate \(\int_{\frac{1}{2}}^{1} \frac{x^{3} - 4}{x^{3}} \mathrm {d} x\).
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Question 19 Report
What is the probability of obtaining a head and a six when a fair coin and and a die are tossed together?
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Question 20 Report
If the determinant of the matrix \(\begin{pmatrix} 2 & x \\ 3 & 5 \end{pmatrix} = 13\), find the value of x.
Question 21 Report
Express \(\frac{13}{4}\pi\) radians in degrees.
To convert radians to degrees, we use the following formula:
degrees = radians × 180°/π
where π is approximately equal to 3.14.
Substituting the given value of radians, we get:
degrees = (13/4)π × 180°/π
The π cancels out, leaving us with:
degrees = (13/4) × 180°
Simplifying the expression, we get:
degrees = 585°
Therefore, the answer is 585°.
Question 22 Report
Given that \(y = x(x + 1)^{2}\), calculate the maximum value of y.
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Question 23 Report
Resolve \(\frac{3x - 1}{(x - 2)^{2}}, x \neq 2\) into partial fractions.
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Question 24 Report
If \(\begin{vmatrix} k & k \\ 4 & k \end{vmatrix} + \begin{vmatrix} 2 & 3 \\ -1 & k \end{vmatrix} = 6\), find the value of the constant k, where k > 0.
Question 25 Report
If \(\log_{3}a - 2 = 3\log_{3}b\), express a in terms of b.
Question 27 Report
If \(\sin\theta = \frac{3}{5}, 0° < \theta < 90°\), evaluate \(\cos(180 - \theta)\).
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Question 29 Report
If \(4x^{2} + 5kx + 10\) is a perfect square, find the value of k.
Question 30 Report
Find the radius of the circle \(x^{2} + y^{2} - 8x - 2y + 1 = 0\).
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Question 31 Report
If \(\alpha\) and \(\beta\) are the roots of the equation \(2x^{2} + 5x + n = 0\), such that \(\alpha\beta = 2\), find the value of n.
Question 32 Report
If the polynomial \(f(x) = 3x^{3} - 2x^{2} + 7x + 5\) is divided by (x - 1), find the remainder.
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Question 33 Report
The first term of a Geometric Progression (GP) is \(\frac{3}{4}\), If the product of the second and third terms of the sequence is 972, find its common ratio.
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Question 34 Report
In how many ways can the letters of the word 'ELECTIVE' be arranged?
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Question 35 Report
Find the angle between forces of magnitude 7N and 4N if their resultant has a magnitude of 9N.
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Question 36 Report
A car is moving at 120\(kmh^{-1}\). Find its speed in \(ms^{-1}\).
Question 37 Report
Simplify \(\frac{\sqrt{3}}{\sqrt{3} -1} + \frac{\sqrt{3}}{\sqrt{3} + 1}\)
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Question 38 Report
If \(\alpha\) and \(\beta\) are the roots of \(2x^{2} - 5x + 6 = 0\), find the equation whose roots are \((\alpha + 1)\) and \((\beta + 1)\).
Question 39 Report
Given that \(f(x) = 3x^{2} - 12x + 12\) and \(f(x) = 3\), find the values of x.
To find the values of x where the function f(x) is equal to 3, we need to solve the equation:
3x^2 - 12x + 12 = 3
We can start by subtracting 3 from both sides:
3x^2 - 12x + 12 - 3 = 3 - 3 3x^2 - 12x + 9 = 0
Next, we can use the quadratic formula to find the solutions for x:
x = (-b ± √(b^2 - 4ac)) / 2a
where a = 3, b = -12, c = 9. Plugging in these values, we get:
x = (-(-12) ± √((-12)^2 - 4 * 3 * 9)) / 2 * 3 x = (12 ± √(144 - 108)) / 6 x = (12 ± √36) / 6 x = (12 ± 6) / 6
So, the two values of x that solve the equation are:
x = (12 + 6) / 6 = 18 / 6 = 3 x = (12 - 6) / 6 = 6 / 6 = 1
Therefore, the two values of x that make f(x) equal to 3 are 1 and 3.
Question 40 Report
Find the equation to the circle \(x^{2} + y^{2} - 4x - 2y = 0\) at the point (1, 3).
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