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XB KENDRIYA VIDYALAYA SANGATHAN, CHENNAI REGION HALF YEARLY EXAMINATION 2022-2023 CLASS: XI - TIME: 3 HOURS MAXIMUM MARKS :80 MATHEMATICS General Instructions: 1.This question paper contains- five sections A,B,C,D and E. Each section is compulsory. However, there are internal choices in some questions. 2.SectionA has 18 MCQs and 02 Assertion-Reason based questions of I mark cach. 3.Section B has 5 Very Short Answer (VSA)type questions of 2 marks each. 4.Section C has 6 Short Answer (SA)- type questions of 3 marks each. 5.Section D has 4 Long Answer (LA)- t pe 6.Section E has 3 source based /case based/ questions of 5marks each. passage based/ integrated units of assessment ( 4marks each ) with subparts. SECTION-A (18 x 1= 18) (Multiple Choice Questions) 1.If A={ 1,2, {3,4),5 }, then (a) 3 EA (b) 4 A( ) { 3,4} CA({3,4) e A 2.IfAand B are any two sets, then (a) 0 An (A UB) is equal to A (b)B (d)AnB 3. The set A= {x: x is a positive prime numbers< 10} in the roster form is (a) { 1,2,3,5,7) (d) None of these. (b) {1,3,5,7,9 2,3,5,7 4.1fA and B (a) A- B are anytwo sets ,then A n (AnB) A-BC is equal to (c)AnB (d) none ofthese. 5.Iffx)= |x], then Rr is equal to (a) R 0, 0) (b) (-0o,0] (d)none of these 6.If f( x) axt b, where a and b are integers ,f(-1) =-5 and f( 3) =3 , thenthe values of a and b respectively (a)-3 and 1 7. if fx)=x, then ftx) +f (a). 2x3 (c) 0 and 2 (6) 2 and -3 Ad)2 and3. isequal to (c).0 (d). 1
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