Questions
Let be the set of all 3 x 3 symmetric matrices tries
are either O or 1. The number of elements in set is
a
23
b
26
c
29
d
18
detailed solution
Correct option is D
X A symmetric matrix is symmetric about its diagonal. equired number of matrices = Number of ways of filling 6 places (3 diagonal and three off diagonal above the diagonal with O and 1)=26Talk to our academic expert!
Similar Questions
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
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