CBSE Class 11-science Answered
there are 6 students a,b,c,d,e,f.
Asked by PRAGYAJHA | 04 Jun, 2012, 12:31: PM
Expert Answer
Total number of arrangment = 6! = 720
Consider c and d to be a single letter then
The number of ways in which c and d are together = 4!2!= 48
Hence, number of ways in which c and d are not together = 720 - 48 = 672.
Answered by | 04 Jun, 2012, 06:01: PM
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