Mathematics Past Questions And Answers
The table shows the marks scored by some candidates in an examination.
| Marks (%) | 0-9 | 10-19 | 20-29 | 30-39 | 40-49 | 50-59 | 60-69 | 70-79 | 80-89 | 90-99 |
| Frequency | 7 | 11 | 17 | 20 | 29 | 34 | 30 | 25 | 21 | 6 |
(a) Construct a cumulative frequency table for the distribution and draw a cumulative frequency curve.
(b) Use the curve to estimate, correct to one decimal place, the :
(i) Lowest mark for distinction if 5% of the candidates passed with distinction ; (ii) probability of selecting a candidate who scored at most 45%.
View Discussion (0)WAEC 2015 THEORY.jpg)
Given that \(x = -\frac{1}{2}and \hspace{1mm} y = 4 \hspace{1mm} evaluate \hspace{1mm} 3x^2y+xy^2\)
- A. -5
- B. -1
- C. 4
- D. 11
Find the equation of a circle with centre (2, -3) and radius 2 units
- A. \(x^{2} + y^{2} - 4x + 6y + 9 = 0\)
- B. \(x^{2} + y^{2} + 4x - 6y - 9 = 0\)
- C. \(x^{2} + y^{2} + 4x + 6y - 9 = 0\)
- D. \(x^{2} + y^{2} + 4x - 6y + 9 = 0\)
Find the value of the constant k for which \(a = 4 i - k j\) and \(b = 3 i + 8 j\) are perpendicular.
- A. \(\frac{2}{3}\)
- B. 2
- C. 3
- D. \(\frac{3}{2}\)
An arc subtends an angle of 50o at the center of circle of radius 6cm. Calculate the area of the sector formed
- A. 100/7
- B. 80/7
- C. 110/7
- D. 90/7
Which of the following is not necessarily sufficient for the construction of a triangle?
- A. Three sides
- B. Two sides and an included angle
- C. Two sides and a right angle
- D. Two sides and an angle
Solve 21% of 70
- a) 29.4
- b) 14.7
- c) 13.9
- d) 7.4
In the diagram, O is the centre, \(\bar{RT}\) is a diameter, ∠PQT = 33° and ∠TOS = 76°. Using the diagram, calculate the value of angle PTR
- A. 73°
- B. 67°
- C. 57°
- D. 37°
A rectangular garden measures 18.6m by 12.5m. Calculate, correct to three significant figures, the area of the garden
- A. 230m2
- B. 231m2
- C. 232m2
- D. 233m2
Convert 22324 to base six
- A. 4506
- B. 2546
- C. 5536
- D. 5406