NCERT Solutions for Class 12 Maths Chapter 3 Miscellaneous Exercise 3 Matrices in Hindi and English Medium for CBSE 2023-2024. Get here the rationalised syllabus based class 12 Maths chapter 3 misc. ex. for session 2023-24.
12th Maths Chapter 3 Miscellaneous Exercise 3 in Hindi and English
|Chapter 3:||Miscellaneous Exercise|
|Content:||NCERT Exercise Solution|
|Content Mode:||Online Videos and Text|
|Medium:||English and Hindi Medium|
NCERT Solutions for Class 12 Maths Chapter 3 Miscellaneous Exercise
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12th Maths Miscellaneous Exercise 3 Solutions
NCERT Solutions for Class 12 Maths Chapter 3 Miscellaneous Exercise 3 Matrices in English and Hindi Medium free to download as well as use it online given below for new academic session. Get all the exercises of Class 12 Mathematics Chapter 3 main page.
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12th Mahs Important Questions with Answer on Matrices
1. Using matrix method, solve the system of linear equations: x – 2y = 10, 2x – y – z = 8 and – 2y + z = 7. [Answer: x = 0, y = – 5, z = – 3]
2. If A = [aij] is a 2 × 2 matrix such that aij = i + 2j, write A.
3. To raise money for an orphanage, students of three schools A, B and C organized an exhibition in their locality, where they sold paper bags, scrap books and pastel sheets made by them using recycled paper, at the rate of ₹20, ₹15 and ₹5 per unit respectively. School A sold 25 paper bags, 12 scrap books and 34 pastel sheets. School B sold 22 paper bags, 15 scrap books and 28 pastel sheets. While school C sold 26 paper bags, 18 scrap books and 36 pastel sheets. Using matrices, find the total amount raised by each school. [Answer: School A = ₹850, School B = ₹805 and School C = ₹970]
Important Questions of 12th Maths Miscellaneous Exercise 3
What are the properties of multiplication of matrices?
The multiplication of matrices possesses the following properties:
1. The associative law For any three matrices A, B and C. We have (AB) C = A (BC), whenever both sides of the equality are defined.
2. The distributive law For three matrices A, B and C.
(i) A (B+C) = AB + AC
(ii) (A+B) C = AC + BC, whenever both sides of equality are defined.
3. The existence of multiplicative identity For every square matrix A, there exist an identity matrix of same order such that IA = AI = A.
What are the properties of transpose of the matrices?
For any matrices A and B of suitable orders, we have
(i) (A′)′ = A,
(ii) (kA)′ = kA′ (where k is any constant)
(iii) (A + B)′ = A′ + B′
(iv) (A B)′ = B′ A′
What do you understand by the term Matrix?
A matrix is an ordered rectangular array of numbers or functions.
How do we find the order of a Matrix?
A matrix having m rows and n columns is called a matrix of order m × n.
12th Mahs Questions from Board Papers
1. If A = [aij] is a square matrix such that aij = i² – j², then write whether A is symmetric or skew-symmetric.
2. Two cricket teams honoured their players for three values, excellent batting, to the point bowling and unparalleled fielding by giving x, y and z per player respectively. The first team paid respectively 2, 2 and 1 players for the above values with a total prize money of 11 lakhs, while the second team paid respectively 1, 2 and 2 players for these values with a total prize money of 9 lakhs. If the total award money for one person each for these values amount to 6 lakhs, then express the above situation as a matrix equation and find award money per person for each value. [Answer: Excellent batting = 3 lakhs, Point bowling = 2 lakhs and Fielding = 1 lakhs]
Can questions from miscellaneous exercise on chapter 3 of class 12th Maths be asked in the first term board exams?
Yes, questions can come from miscellaneous exercise on chapter 3 of class 12th Maths in the board exams. This exercise is important from an exam point of view. Students should practice all questions and examples of this exercise for the exams because any question and example can come in the board exams. The problems which have more chance to come in the exams are examples 26, 27, 28 and questions 1, 3, 5, 6, 7, 9, 10, 11, 13, 14, 15.
How long it takes to complete miscellaneous exercise on chapter 3 of class 12th Maths?
Students need a maximum of 3-4 days to complete miscellaneous exercise on chapter 3 of class 12th Maths if they give at least 2 hours per day to this exercise. This time also depends on student’s working speed, efficiency, capability, and many other factors.
Is miscellaneous exercise on chapter 3 of grade 12th Maths tough to solve?
Miscellaneous exercise on chapter 3 of class 12th Maths is not easy and not tough. It lies in the mid of easy and tough because some examples and questions of this exercise are easy, and some are complex. However, the difficulty level of any topic varies from child to child. So, miscellaneous exercise on chapter 3 of class 12th Maths is tough or not depends on children also. Some children find it difficult, some find it easy, and some find it in the middle of easy and difficult.
Is miscellaneous exercise on chapter 3 of class 12th Maths lengthy?
Miscellaneous exercise on chapter 3 of class 12th Maths is short. Only three examples (examples 26, 27, 28) and 15 questions are there in miscellaneous exercise on chapter 3 of class 12th Maths. This exercise is interesting, nice, and logical.