Let A be the set of all 3 x 3 matrices all of whoseentries  are either  O or 1. The number of elements is set A, is  

Let A be the set of all 3 x 3 matrices all of whose

entries  are either  O or 1. The number of elements is set A, is 

 

  1. A

    23

  2. B

    26

  3. C

    18

  4. D

    29

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    Solution:

    There are 9 elements in a 3 x 3  matrix and 

    each ~I can take two values. So, total number 

    of matrices having  0 and 1 as their elements is 29 

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