Question

The number of all possible matrices of order 1×2 with entry 1 or 2 or 3 is:​

Answer 1

Given :   matrices of order 1×2

To Find :  The number of all possible matrices with entry 1 or 2 or 3

Solution:

matrices of order 1×2

Hence there are 2  elements in  matrix

Each element can be in 3 ways  

3 * 3 = 9 ways

Hence 9 matrix are possible

1   1

1   2

1    3

2    1

2   2

2   3

3   1

3    2

3     3

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Answer 2

HELLO DEAR,

GIVEN:- $\large{The\:number\:of\:all\:possible\:}\\\large{matrices\:of\:order\:1×2\:with\:}\\\large{entry\:1\:or\:2\:or \:3 \:is\:}$

SOLUTION:- The matrices order should be 1×2.

                    And all possible entry is 1 or 2 or 3.

                    So, the matrices be ,

                    [ 1 , 1 ]

                    [ 1 , 2 ]

                    [ 1 , 3 ]

                    [ 2 , 1 ]

                    [ 2 , 2]

                    [ 2 , 3 ]

                    [ 3 , 1 ]

                    [ 3 , 2 ]

                    [ 3 , 3 ]

                 Therefore all posible matices is 9 with entry

                 1 or 2 or 3. And order is 1×2.

THANKS.