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[" Comprehension ( 3questions) "],[" Let...

[" Comprehension ( 3questions) "],[" Let "A" be the set of all "3times3" symmetric matrices all of whose entries are either "0" or "1." Five of these "],[" entries are "1" and four of them are "0.],[[" (a) The number of matrices in "H," is- "," (C) "9," (D) "3],[" (A) "12," (B) "6," (C) "9]]

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