CUET Preparation Today
The number of square matrices of order 2 using numbers 1 and -1 exactly once and the number 0 twice is: |
24 09 12 6 |
12 |
The correct answer is Option (3) - 12 We have 4 spaces so no. of ways to fill them using numbers 1 and -1 exactly once and the number 0 twice is $\frac{4!}{2!}=12$
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