# Case study problem matrix 2 chapter 3 class 12

# Case study Chapter 3 (Matrix)

**Case study 2:- Amit, Biraj and chirag were giventhe task of creating a square matrix of order 2. Below are the matrices created by them. A, B, C are the matrices created by Amit, Biraj and Chirag respectively.(Case study problem matrix 2)**

**If a = 4 and b = -2**

**Based on the above information answer the following question.**

**(i) (a) Find the sum of the matrices A, B and C, A+(B+C).**

**(b) Evaluate** .

**(ii) (a) Find th matrices AC – BC.**

**(b) Find the matrix of (a + b)B**.

**Solution (i) (a) We have,**

**(b) We have**

**(ii) (a) we have,**

**(b) We have,**

**Case study 1:- Read the following and answer the question(Case study problem matrix 1)**

** A manufacturer produces three stationery products Pencil, Eraser and Sharpner which he sells in two markets. Annual sales are indicated below**

**Solution:** For solution click here

**Case study 3:- Read the following and answer the question:(Case study problem matrix 3)**

** Three schools DPS, CVC and KVS decided to organize a fair for collecting money for helping the flood victims. They sold Handmade fans, Mats and plates from recycled material at a cost of ₹25, ₹ 100 and ₹50 each respectively. The number of articles sold are given as.**

**Solution:** For solution click here