Asit Das Gupta and Alok Kumar Solutions for Exercise 1: EXERCISE 1A

State whether given collection is a set or not?

All the intelligent student of your class. 

State whether the given collection is a set or not?

All the beautiful girls in a school. 

State whether the given collection is a set or not?

All the great cricketers of India.

Represent the given set in the tabular from.

$\mathrm{C}=\left\{y\right|y \mathrm{is} \mathrm{a} \mathrm{letter} \mathrm{of} \mathrm{the} \mathrm{word} \mathrm{PINEAPPLE}\}$

If $X=\left\{x\right|x$ is a prime divisor of $72$}, $2$_____$X$ ( belongs to ,  not belongs to).

If $X=\left\{x\right|x$ is a prime divisor of $72$}, then $3\notin X$.

The given statement is _____. [correct / incorrect]

If $X=\left\{x\right|x$ is a prime divisor of $72$}, $7$_____ an element of $X$ . (is/ is not)

Express the following set in the set-builder form: $\{1,3,5,7,9\}$