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READ THESE INSTRUCTIONS FIRST
Write your Centre number, candidate number and name on all the work you hand in.Write in dark blue or black pen.You may use an HB pencil for any diagrams or graphs.Do not use staples, paper clips, glue or correction fl uid.DO NOT WRITE IN ANY BARCODES.
Answer all questions.If working is needed for any question it must be shown below that question.Electronic calculators should be used.If the degree of accuracy is not specifi ed in the question, and if the answer is not exact, give the answer to three signifi cant fi gures. Give answers in degrees to one decimal place.For π, use either your calculator value or 3.142.
At the end of the examination, fasten all your work securely together.The number of marks is given in brackets [ ] at the end of each question or part question.The total of the marks for this paper is 70.
Answer x = ................................................ [3]__________________________________________________________________________________________
Answer x = ................................................
y = ................................................ [3]__________________________________________________________________________________________
13 y varies directly with 5x + . y = 4 when x = –1.
Find y when x = 11.
Answer y = ................................................ [3]__________________________________________________________________________________________
16 A helicopter fl ies from its base B to deliver supplies to two oil rigs at C and D. C is 6 km due east of B and the distance from C to D is 8 km. D is on a bearing of 120° from B.
18 If it rains today the probability that it will rain tomorrow is 0.4 . If it does not rain today the probability that it will rain tomorrow is 0.2 . On Sunday it rained.
(a) Complete the tree diagram for Monday and Tuesday.
Rain
No rain0.6
0.4
Rain
Monday Tuesday
No rain
........
0.4
Rain
No rain........
........
[2]
(b) Find the probability that it rains on at least one of the two days shown in the tree diagram.
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Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.