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Waec Mathematics Past QuestionsQuestion 1276:(a) If \(9 \cos x - 7 = 1\) and \(0° \leq x \leq 90°\), find x. (b) Given that x is an integer, find the three greatest values of x which satisfy the inequality \(7x < 2x - 13\). Question 1277:The table shows the number of children per family in a community.
(a) Find the : (i) mode ; (ii) third quartile ; (iii) probability that a family has at least 2 children. (b) If a pie chart were to be drawn for the data, what would be the sectorial angle representing families with one child? Question 1278:(a) Out of 30 candidates applying for a post, 17 have degrees, 15 have diplomas and 4 neither degree nor diploma. How many of them have both? (b) In triangle PQR, M and N are points on the side PQ and PR respectively such that MN is parallel to QR. If < PRQ = 75°, PN = QN and < PNQ = 125°, determine : (i) < NQR ; (ii) < NPM. Question 1279:In the diagram, ABCDEF is a triangular prism. < ABC = < DEF = 90°, /AB/ = 24 cm, /BC/ = 7 cm and /CD/ = 40 cm. Calculate : (a) /AC/ ; (b) the total surface area of the prism. Question 1280:(a) If \(\log 5 = 0.6990, \log 7 = 0.8451\) and \(\log 8 = 0.9031\), evaluate \(\log (\frac{35 \times 49}{40 \div 56})\). (b) For a musical show, x children were present. There were 60 more adults than children. An adult paid D5 and a child D2. If a total of D1280 was collected, calculate the (i) value of x ; (ii) ratio of the number of children to the number of adults ; (iii) average amount paid per person ; (iv) percentage gain if the organisers spent D720 on the show. |
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