# NCERT Class 11-Math's Exemplar Chapter 1 Sets CBSE Board Problems

Glide to success with Doorsteptutor material for UGC Public-Administration: fully solved questions with step-by-step explanation- practice your way to success.

**Question 19:**

For all sets A and B,

**Answer:**

Given: There are two sets A and B

To prove:

Take L.H.S

Distributive property of set:

= R.H.S

Hence Proved

**Question 20:**

For all sets A and B,

**Answer:**

Given: There are two sets A and B

To prove:

Take L.H.S

Distributive property of set:

**Hence Proved**

**Question 21:**

For all sets A and B,

**Answer:**

Given: There are two sets A and B

To prove:

Take L.H.S

Distributive property of set:

Hence Proved

**Question 22:**

Is an empty set? Justify your answer.

**Answer:**