1990 - WAEC Mathematics Past Questions and Answers - page 5
The bearing of a point X from a point Y is 074°. What is the bearing of Y from X?
< YXS = 74° (alternate angles, N\(_1\) S\(_1\) // N\(_2\) S\(_2\))
N\(_2\) E\(_2\) S\(_2\) = 180°
\(\therefore\) Bearing of Y from X = 180° + 74°
= 254°
The annual salary of Mr. Johnson Mohammed for 1989 was N12,000.00. He spent this on agriculture projects, education of his children, food items, saving , maintenance and miscellaneous items as shown in the pie chart
How much money did he invest in agriculture?
Agric project = \(\frac{120}{360} \times N12,000.00\)
= \(N4,000.00\)
The table shows that the amount of money (in naira)collected through voluntary donations in a secondary school. What is the mode?
The table shows that the amount of money (in naira)collected through voluntary donations in a secondary school.
What is the median of distributionTwo groups of male students cast their votes on a particular proposal. The result are as follows:
| In favor | Against | |
| Group A | 128 | 32 |
| Group B | 96 | 48 |
If a student in favor of the proposal is selected for a post, what is the probability that he is from group A?
Probability that a student in favor is group A
= \(\frac{128}{128 + 32 + 96 + 48}\)
= \(\frac{128}{304}\)
= \(\frac{8}{19}\)
Two groups of male students cast their vote on a particular proposal. The results are as follows:
| In favor | Against | |
| Group A | 128 | 32 |
| Group B | 96 | 48 |
If a student is chosen at random, what is probability that he is against the proposal?
Probability that the student is against the proposal
= \(\frac{32 + 48}{128 + 32 + 96 + 48}\)
= \(\frac{80}{304}\)
= \(\frac{5}{19}\)
The annual salary of Mr. Johnson Mohammed for 1989 was N12,000.00. He spent this on agriculture projects, education of his children, food items, saving , maintenance and miscellaneous items as shown in the pie chart
How much did he spend on food items?
Degree for food items = 360° - (120° + 80° + 43° + 30° + 18°)
= 360° - 291°
= 69°
∴∴ Amount spent on food items = \(\frac{69}{360}\)×12,000.00
= N2300.00