Prime DSE Series - Mathematics Mock Exam Papers (Compulsory)(Sixth Edition) Set 2 Paper 1&2

16 HKDSE-MATH-CP (Set 2 P2) © United Prime Educational Publishing (HK) Ltd. 43. There are three stages in a mobile phone game. The probabilities that a boy clears all tasks in the first stage, the second stage and the third stage are 5 1 , 7 1 and 13 1 respectively. The probability that the boy clears all tasks in at least 1 stage of the game is A. 455 1 . B. 455 167 . C. 455 288 . D. 455 454 . 44. In a test, the standard deviation of the test scores is 5 marks. Sam gets 85 marks in the test and his standard score is 3. If the standard score of Tony in the test is 0, then he gets A. 0 mark. B. 17 marks. C. 67 marks. D. 70 marks. 45. It is given that p , q , r , s and t are five distinct real numbers. Let x 1 , y 1 and z 1 be the median, the variance and the range of the group of numbers { p , q , r , s , t } respectively while x 2 , y 2 and z 2 be the median, the variance and the range of the group of numbers { p 4 - , q 4 - , r 4 - , s 4 - , t 4 - } respectively. Denote the median, the variance and the range of the group of numbers {2 p , 2 q , 2 r , 2 s , 2 t } by x 3 , y 3 and z 3 respectively. Which of the following is/are true? I. x x x 1 2 3 2 - II. y y y 1 2 3 1 + III. z z z 1 2 3 1 + A. I only B. II only C. I and III only D. II and III only END OF PAPER Sample © United Prime Educational Publishing (HK) Limited 2025 All rights reserved; no part of this publication may be reproduced, photocopied, recorded or otherwise, without the prior written permission of the Publisher.