Problem is attached

Asked by sudhanshubhushanroy | 8th Dec, 2017, 05:59: AM

Expert Answer:

begin mathsize 16px style Class space straight I space boys space can space be space sit space together space by space 3 factorial space ways
Similarly space for space class space II space boys space 4 factorial space ways space and space class space III
boys space in space 5 factorial space ways. space
Also space the space groups space can space be space arranged space in space 3 factorial space ways.
Total space number space of space ways space equals equals space 3 factorial space 4 factorial space 5 factorial space 3 factorial end style

Answered by Sneha shidid | 8th Dec, 2017, 12:05: PM