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ndthanh/random_unique

Created February 23, 2017 03:09
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random_unique
E4=IFERROR(LARGE(ROW(INDIRECT($B$1&”:”&$B$2))*NOT(COUNTIF($E$3:E3,ROW(INDIRECT($B$1&”:”&$B$2)))),RANDBETWEEN(1,$B$2-$B$1-ROW(A1)+2)),””)
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