Class XI Chapter 1 – Sets Maths ______________________________________________________________________________ Question 9: If A3,6,9,12,15,18, 21 , B 4,8,12,16, 20 , C D find (i) A B (ii) A C (iii) A D (iv) B A (v) C A (vi) D A (vii) B C (viii) B D (ix) C B (x) D B (xi) C D (xii) D C Solution 9: (i) (ii) AB AC 3,6,9,15,18, 21 3,9,15,18, 21 (iii) AD 3,6,9,12,18, 21 (iv) (v) (vi) (vii) (viii) (ix) (x) (xi) (xii) B A C A D A BC C 4,8,16,20 2, 4,8,10,14,16 BD B DB C D 5,10, 20 20 4,8,12,16 2,6,10,14 5,10,15 DC 2,4,6,8,12,14,16 5,15, 20 2, 4,6,8,10,12,14,16 , 5,10,15, 20 ; Printed from Vedantu.com. Register now to book a Free LIVE Online trial session with a Top tutor.

Class XI Chapter 1 – Sets Maths ______________________________________________________________________________ Question 10: If X a, b, c, d (i) X Y (ii) Y X (iii) X Y Solution 10: (i) (ii) (iii) X Y a, c Y X f , g X Y b, d and Y f , b, d, g , find Question **11**: IF R is the set real numbers and Q is the set of rational numbers, then what is R – Q? Solution **11**: R: Set of real numbers Q: Set of rational numbers Therefore, R – Q is asset of irrational number. Question 12: State whether each of the following statement is true or false. Justify you answer. are disjoint sets. 2,3,4,5 a, e, i, o, u 2,6,10,14 3,6 (i) and (ii) and (iii) and (iv) and Solution 12: 2,6,10 a, b, c, d are disjoint sets. 3,7,**11**,15 are disjoint sets. 3,7,**11** (i) False 3 2,3, 4,5 ,3 3,6 As 2,3, 4,5 3,6 3 (ii) False a a, e, i, o, u , a a, b, c, d As a, e, i, o, u a, b, c, d a (iii) True As 2,6,10,14 (iv) True As 2,6,10 3,7,**11** are disjoint sets. 3,7,**11**,15 = . Printed from Vedantu.com. Register now to book a Free LIVE Online trial session with a Top tutor.

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Class XI Chapter 12 - Introduction

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