Three a's, three b's and three c's are placed randomly  in  `3xx3`  matrix. The
Channel: Doubtnut
Date: 2020-05-24

Three a's, three b's and three c's are placed randomly  in  `3xx3`  matrix. The probability that  no row or column contain two identical letters can be  expressed as `(p)/(q)`, where p and q are coprime  then `(p+q)` equals to :