Statistics Paper 2014, Question No. 2

(i) 8!
(ii) Every couple is now a single entity. There are 4 total entities. Hence, answer = 4!
(iii) All men are now a single entity. Total 5 entities, hence 5! ways. However 4 men can also be made to sit in 4! ways among themselves. Hence, answer = 5!*4! .