**NCERT Solutions for Class 11 Maths Chapter 7 Permutations and
Combinations Ex 7.2**

NCERT Solutions for Class
11 Maths Chapter 7
Permutations and Combinations Ex 7.2 are the part of NCERT Solutions for Class
11 Maths. Here you can find the NCERT Solutions for Class 11 Maths chapter 7
Permutations and Combinations Ex 7.2.

**Ex 7.2 Class 11 Maths Question 1.**

Evaluate**(i)**8!

**(ii)**4! – 3!

**Solution.**

**(i)** 8! = 1 × 2 × 3 × 4 × 5 × 6 × 7 × 8 = 40320

**(ii)** 4! – 3! = (1 × 2 × 3 × 4) – (1 × 2 × 3) = 24 – 6 = 18

**Ex
7.2 Class 11 Maths Question 2.**

Is
3! + 4! = 7!?

**Solution: **We have, 3! = 1 × 2 × 3 = 6 … (1)

4! = 1** **×
2 × 3 × 4 = 24 … (2)

Adding (1) and (2), we get

3!** + **4! = 6 + 24 = 30

7! = 1** **×
2 × 3 × 4 × 5 × 6 × 7 = 5040

Therefore, 3! + 4! ≠ 7!

**Ex 7.2 Class 11
Maths Question 3.**

**Solution:**

**Ex 7.2 Class 11
Maths Question 4.**

**Solution:**

**Ex 7.2 Class 11 Maths Question-5**

**Solution:**