Waec Mathematics 2010 Past Questions and Answers

Question 61:

• WAEC 2010

(a)
In the diagram, < PTQ = < PSR = 90°, /PQ/ = 10 cm, /PS/ = 14.4 cm and /TQ/ = 6 cm. Calculate the area of the quadrilateral QRST.
(b) Two opposite sides of a square are each decreased by 10% while the other two are each increased by 15% to form a rectangle. Find the ratio of the area of the rectangle to that of the square.

Question 62:

• WAEC 2010

The frequency distribution of the weight of 100 participants in a high jump competition is as shown below :

Weight (kg)	20 - 29	30 - 39	40 - 49	50 - 59	60 - 69	70 - 79
Number of Participants	10	18	22	25	16	9

(a) Construct the cumulative frequency table.
(b) Draw the cumulative frequency curve.
(c) From the curve, estimate the : (i) median ; (ii) semi- interquartile range ; (iii) probability that a participant chosen at random weighs at least 60 kg.