1992 - WAEC Mathematics Past Questions and Answers - page 4
A ladder leans against a vertical wall at an angle
60° to the wall, if the foot of the ladder is 5 metres
away from the wall, calculate the length of the
ladder.
The ladder makes 60° inclination with the wall and its foot is 5m away from the wall.
Sketching the diagram, you will see that we have
\(sin 60 = \frac{5}{x}\) (where x is the length of the ladder)
⇒ \(x = \frac{5}{sin60}\)
\(x = \frac{10\sqrt{3}}{3}m\)
high. if the angle of depression of a point on the
opposite side of the river is 60° find the width of
the river.
5m of point Z. Calculate XY
65, 72, 55, 48, 78
The data above shows the frequency distribution
of marks scored by a group of students in a class
test.
How many students took the test?
The data below shows the frequency distribution
of marks scored by a group of students in a class
test.
What is the modal score
The data below shows the frequency distribution
of marks scored by a group of students in a class
test.
Find the mean mark.
(to the nearest degree) and obtained the following
results: 75o, 76o, 72o, 73o, 74o, 79o, 72o, 72o, 77o,
72o, 71o, 70o, 78o, 73o. Find the mode
| Marks | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| No of students | 1 | 3 | 2 | 0 | 1 | 6 | 1 | 0 | 1 | 0 |
The table above shows the scores of 15 students in a Physics test.
How many students scored at least 5?
No of students that scored at least 5 = 1 + 6 + 1 + 0 + 1 + 0
= 9 students.
....,9, 10). What is the probability that the number
is greater than or equal to 7?
(x ≥ 7 ) = 7 7, 8, 9, 10 = 4
Total number of possible outcome = 10
4/10 = 2/5