## EXRECISE 4 D

1. State which of the following sets are finite and which are infinite

(i) {Number of people in india}

(ii) {Multiples of 7}

(iii) {0 , 1 , 2 , 3 …..}

(iv) {x | x is a multiple of 2 less than 48}

(v) The set of teachers in your school

(vi) The set of animals on earth

(vii) The set of leaves on a tree

(viii) The set of grains of sand in a small jar

(ix) The set of men who have landed on the moon

(x) The set of atoms on Earth

2. Which of the following are singleton sets ?

(i) {Capital of USA}

(ii) {Mountain peaks more than 6000 m high}

(iii) {The men who have landed on moon }

(iv) {Ecen numbers which are prime }

3. State which of the following are null or empty sets ?

(i) The set of women army chief in india since 1947 .

(ii) {Men over 300 years old}

(iii) The set of odd numbers divisible by 2

(iv) The set of teachers teaching you

(v) {Cubes with 8 faces}

(vi) {Days with 14440 minutes}

(vii) {Even numbers which are prime}

(viii) {x | x is a person over 100 m tall}

(ix) {Horses which have five legs}

(x) {Capitals of the states of india}