Two variants of the CAT paper are to be given to 12 students. In how many ways can the students be placed in two rows of six each so that there should be no identical variants side by side and that the students sitting one behind the other should have the same variant. Find the number of ways this can be done Choose the correct choice from the following choices:  A) 2 x 12C6 x (6!)2  B) 2 x 6! x 6!  C) 2 x 12C6 x 6!  D) 2 x 6! x 8!  E) none of these
First select 6 people out of 12 for the first row.   The other six automatically get selected for the second row.   Arrange the two rows of people amongst themselves. Besides, the papers can be given a pattern of 121212 or 212121.   Hence the answer is 2 x 12C6 x (6!)2   2 x 12C6 x (6!)2NSWER:2 x 12C6 x (6!)2
<result>A</result>
Two variants of the CAT paper are to be given to 12 students. In how many ways can the students be placed in two rows of six each so that there should be no identical variants side by side and that the students sitting one behind the other should have the same variant. Find the number of ways this can be done