Q.

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

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a

23

b

26

c

18

d

29

answer is D.

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Detailed 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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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