Question

Question 4 Write down all the subsets of the following sets:

(i) {a}

(ii) {a, b}

(iii) {1, 2, 3}

(iv) Φ

Class XI - Sets Page 13

Answer 1

1. {a},©
2.{a},{b},{a,b},©
3.{1},{2},{3},{1,2},{1,3},{2,3},{1,2,3},©
4.©

note: treat © as phi .

you can check you answer by this formula

no of subsets = 2^n

where is the no of elements of Set

Answer 2

1) {a} , ∅
2){a} , ∅ , {b},{a,b}
3){1},{2},{3},{1,2},{1,3},{1,2,3},{2,3},∅
4)∅