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# CBSE Class 12 Pre Board 2021 : Mathematics - Set 3 (CBSE Gulf Sahodaya Qatar Chapter, Doha)

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PRE BOARD EXAMINATION - 1(2020-21) MATHEMATICS (041) Time: 3 hrs C LASS: XII Max.Marks:80 General Instructions: 1. This question paper contains two parts A and B. Each part is compulsory. Part A carries 24 marks and Part B carries 56 marks 2. Part-A has Objective Type Questions and Part -B has Descriptive Type Questions 3. Both Part A and Part B have choices Part A: 1. It consists of two sections- I and II. 2. Section I comprises of 16 very short answers type questions. 3. Section II contains 2 case studies. Each case study comprises of 5 case-based MCQs. An examinee is to attempt any 4 out of 5 MCQs. Part B: 1. It consists of three sections- III, IV and V. 2. Section III comprises of 10 questions of 2 marks each. 3. Section IV comprises of 7 questions of 3 marks each. 4. Section V comprises of 3 questions of 5 marks each. 5. Internal choice is provided in 3 questions of Section III, 2 questions of Section IV and 3questions of Section-V. You have to attempt only one of the alternatives in all such questions. Part A Section I All questions are compulsory. In case of internal choices attempt any one. 1.Let the relation R be defined in N by aRb if 2a + 3b = 30, then find R. 1 2.If A = {a, b, c, d} and f = {a, b), (b, d), (c, a), (d, c)}, show that f is one- one from A nto A. OR For the set A = {1, 2, 3}, define a relation R in the set A as follows: 1 R = {(1, 1), (2, 2), (3, 3), (1, 3)} .Write the ordered pairs to be added to R to make it the smallest equivalence relation.

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