<PRE><B>Question 928662</B>
Consider couples as one unit and that they may sit to the right or left of one another
2(5!) different arrangements are possible 
......
WI SC ON SI N  (9 Letters: 2Is, 20ss, 2Ns)
{{{9!/(2!*2!*2!)}}} are how many different “Words” are possible 
.........

50 members and 20 pledges
In how many ways can the executive committee be formed as described:
{{{(50P3)(20C3)}}} ways</PRE>