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If A=[{:(1,-1,1),(0,2,-3),(2,1,0):}] and...

If `A=[{:(1,-1,1),(0,2,-3),(2,1,0):}]` and `B=(adjA)` and `C=5A`, then find the value of `(|adjB|)/(|C |)`

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The correct Answer is:
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`(|adj(adjA)|)/(|5A|)=(|A|^((3-1)^(2)))/(5^(3)|A|)=(5^(4))/(5^(3).5)=1`
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