Waec Mathematics Past Questions and Answers

Question 161:

• WAEC 1990

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?

A. 3/19
B. 4/19
C. 5/19
D. 9/19
E. 10/19

Question 162:

• WAEC 1990

(a) Simplify \(\frac{0.016 \times 0.084}{0.48}\) [Leave your answer in standard form].
(b) Eight wooden poles are to be used for pillars and the lengths of the poles form an Arithmetic Progression (A.P). If the second pole is 2m and the sixth is 5m, give the lengths of the poles, in order.

Question 163:

• WAEC 1990

Show on a graph, the area which gives the solution set of the inequalities: \(y - 2x \leq 4 ; 3y + x \geq 6 ; y \geq 7x - 9\).

Question 164:

• WAEC 1990

(a) Prove that the sum of the angles in a triangle is 2 right angles.
(b) The side AB of a triangle ABC is produced to a point D. The bisector of ACB cuts AB at E. Prove that < CAE + < CBD = 2 < CEB.

Question 165:

• WAEC 1990

A carpenter was told to make a rectangular desk with top of dimension 50cm by 40cm. The carpenter actually made the desk 60cm by 35cm.
(a) Calculate the percentage error in the (i) length and the breadth ; (ii) area of the table top.
(b) Find the product of the two errors in a(i).