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Question

Consider the set A of all determinants of order 3 with entries 0 or 1 only. Let B be the subset of A consisting of all determinants with value 1. Let C be the subset of A consisting of all determinants with value -1. Then,

A
C is empty
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B
B has as many elements as C
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C
A = B C
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D
B has twice as many elements as C
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Solution

The correct option is D B has twice as many elements as C
Since, A is the determinant of order 3 with entries 0 or 1 only.
Also, B is the subset of A consisting of all determinants with value 1.
[since, if we interchange any two rows or columns, then among themself sign changes]
Given, C is the subset having determinant with value -1.
B has many elements as C.

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