(i) If a, b and c are in continued proportion, then prove that:


(ii) In the given diagram, O is the centre of circle circumscribing the ∆ABC. CD is perpendicular to chord AB. ∠OAC=32°. Find each of the unknown angles x, y and z


(iii) Study the graph and answer each of the following:
(a) Name the curve plotted
(b) Total number of students
(c) The median marks
(d) Number of students scoring between 50 and 80 marks

Solution

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