# CBSE Class 11-Mathematics: Questions: Permutation Exercise 2 (For CBSE, ICSE, IAS, NET, NRA 2022)

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**Question 1**:

Evaluate

(i)

(ii)

**Question 2**:

Is

**Question 3**:

Compute

**Question 4**:

Calculate if

**Question 5**:

Evaluate,

when

(i)

(ii)

**Solution 1**

We know that

So, solving the below questions based on that

(i)

(ii) First calculate the factorials

Then

**Solution 2**

We know that factorials are given by

So, solving the below questions based on that

So, it is clear that

**Solution 3**

**Solution 4**:

Cancelling On both the sides

Solving this

**Solution 5**:

When

(i)

(ii)