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If [ vec a vec b vec c]=2 and vec x=2 v...

If `[ vec a vec b vec c]=2` and `vec x=2 vec a+3 vec b+ vec c , vec y= vec a- vec b-3 vec c` and `vec z=3 vec a- vec b+2 vec c` then `[ vec x vec y vec z]=` (A) 88 (B) -82 (C) 50 (D) none of these

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