Question

Question 1 Make correct statements by filling in the symbols⊂or⊄in the blank spaces:

(i) {2, 3, 4} … {1, 2, 3, 4, 5}

(ii) {a, b, c} … {b, c, d}

(iii) {x: x is a student of Class XI of your school} … {x: x student of your school}

(iv) {x: x is a circle in the plane} … {x: x is a circle in the same plane with radius 1 unit}

(v) {x: x is a triangle in a plane}…{x: x is a rectangle in the plane}

(vi) {x: x is an equilateral triangle in a plane}… {x: x is a triangle in the same plane}

(vii) {x: x is an even natural number} … {x: x is an integer}

Class XI - Sets Page 12

Answer 1

(i) {2, 3, 4} ⊂ {1, 2, 3, 4, 5}

(ii) {a, b, c} ⊄{b, c, d}

(iii) {x: x is a student of Class XI of your school} ⊂ {x: x student of your school}

(iv) {x: x is a circle in the plane} ⊄{x: x is a circle in the same plane with radius 1 unit}

(v) {x: x is a triangle in a plane}⊄{x: x is a rectangle in the plane}

(vi) {x: x is an equilateral triangle in a plane} ⊂{x: x is a triangle in the same plane}

(vii) {x: x is an even natural number} ⊂{x: x is an integer}