10 students are to be seated in two rows equally for the Mock test in a room. There are two sets of papers, Code A and Code B. each of two rows can have only one set of paper but different that from other row. In how many ways these students can be arranged ? Choose the correct option.
A) 2775600
B) 125600
C) 7257600
D) 1200560
E) None of these
Solution: 5 students can be seated out of 10 students in 10C5 ways .   Remaining 5 will be seated in,   = 5C5 ways .   Students of each row can be arranged as,   = 5! *5! ways.   Two sets of paper can be arranged themselves in,   = 2! ways.   Thus, Total arrangement,   = 10C5 * 5! *5! *2   = 7257600.   Answer: Option 7257600
<result>C</result>
10 students are to be seated in two rows equally for the Mock test in a room. There are two sets of papers, Code A and Code B. each of two rows can have only one set of paper but different that from other row. In how many ways these students can be arranged ?