Matrices - Gujarat Board (GSEB) STD 12 Science Maths Questions

If $A=\left[\begin{array}{cc}2 & -3 \\ -1 & 2\end{array}\right]$ and $B=\left[\begin{array}{ll}2 & 3 \\ 1 & 2\end{array}\right]$ two matrix, then find AB ?

✓
$\left[\begin{array}{ll}1 & 0 \\ 0 & 1\end{array}\right]$
B
$\left[\begin{array}{ll}0 & 1 \\ 0 & 0\end{array}\right]$
C
$\left[\begin{array}{ll}1 & 1 \\ 1 & 1\end{array}\right]$
D
$\left[\begin{array}{ll}1 & 1 \\ 0 & 0\end{array}\right]$

Answer: A.

View full solution →

Q 4M.C.Q (1 Marks)1 Mark

If $\left[\begin{array}{cc}3 c+6 & a-d \\ a+d & 2-3 b\end{array}\right]=\left[\begin{array}{cc}12 & 2 \\ -8 & -4\end{array}\right]$ then find $a b-c d$ :

✓
4
B
16
C
-4
D
-16

Answer: A.

View full solution →

Q 5M.C.Q (1 Marks)1 Mark

All possible number of matrix of order $2 \times 3$ which has every entry is 1or 2.

A
16
B
6
✓
64
D
24

Answer: C.

View full solution →

Q 62 Marks2 Marks

If A, B has any two symmetric matrix. Then prove that $A B + B A$ will be a symmetric matrix.

View full solution →

Q 73 Marks3 Marks

In $\left[\begin{array}{cc}x+y & 2 \\ 5+z & x y\end{array}\right]=\left[\begin{array}{ll}6 & 2 \\ 5 & 8\end{array}\right]$ find the value of $x, y, z$ ?

View full solution →

Q 84 Marks4 Marks

A and B has two families. Family A has 4 male, 6 female and 2 children and family B has 2 male, 2 female and 4 children. Every male, female and children has suggested to give respectively 2400, 1900 and 1800 calories per day and 45,55 and 33 gm. protein also. From this informa tion prepare a matrix. Using multiplication of matrix, find the total quantity of calorie and protein for every family.

View full solution →

Browse all question groups ↑

Generate Paper Free All Maths chapters

Matrices question types

Matrices questions

Generate a Matrices paper free

Matrices Maths - Matrices

Matrices question types

Matrices questions

Generate a Matrices paper free