Mathematics Past Questions And Answers
The table shows the distribution of marks obtained by students 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.
(b) Draw the cumulative frequency curve for the distribution.
(c) Using the curve, find correct to one decimal place, the:
(i) median mark;
(ii) lowest mark for the distinction if 5% of the students passed with distinction
View Discussion (0)WAEC 2020 THEORYWhat is the locus of points equidistant from the lines ax + by + c = 0?
- A. A line bx - ay +q = 0
- B. A line ax - by +q = 0
- C. A line bx + ay +q = 0
- D. A line ax + by +q = 0
The followings are true concerning a trapezium except
- A. It does not have any line of symmetry
- B. All the sides are of different lengths
- C. All the angles are of different sizes
- D. It has two angles equal but others different.
The mean of x,x?1,x+7, and x+10 is 9. Find the value of x.
- A. 5
- B. 4
- C. 9
- D. 8
Express \(413_7\) to base 5
- A. \(2311_5\)
- B. \(1131_5\)
- C. \(1311_5\)
- D. \(2132_5\)
If \(\frac {3 - \sqrt 3}{2 + \sqrt 3} = a + b\sqrt 3\), what are the values a and b?
- A. a = 9, b = -5
- B. a = 5, b = 9
- C. a = 9, b = 5
- D. a = -5, b = 9
The average of x,x+20,x?1, and x?15 is 10. Find the value of the largest number.
- A. 12
- B. ?9
- C. 29
- D. 10
The sum of the interior angle of a regular polygon is 1800o. Calculate the size of one exterior angle of the polygon
- A. 30°
- B. 24°
- C. 18°
- D. 12°
The graph of the relation y = x2 + 2x + k passes through the point (2, 0). Find the values of k
- A. zero
- B. -2
- C. -4
- D. -8
The coordinates of the centre of a circle is (-2, 3). If its area is \(25\pi cm^{2}\), find its equation.
- A. \(x^{2} + y^{2} - 4x - 6y - 12 = 0\)
- B. \(x^{2} + y^{2} - 4x + 6y - 12 = 0\)
- C. \(x^{2} + y^{2} + 4x + 6y - 12 = 0\)
- D. \(x^{2} + y^{2} + 4x - 6y - 12 = 0\)