Re: Discussion Problem_ (2)

Posted by Sumit on Apr 10, 2013; 8:37am
URL: http://discussion-forum.276.s1.nabble.com/Discussion-Problem-2-tp7579991p7580021.html

@thanks duck....

@Maahi: As duck said two cases will be birthday of 6 people falls into one month of two selected Months..

e.g suppose if we choose Jan n Feb From 12 months(i.e An element of 12C2)...we are subtracting two casses that is 1)all 6 people birthday fall in Jan
2) all 6 people birthday fall in feb..
we subtract it bcoz question says birthday fall in exactly 2 months...


-we are dividing by 12^6 bcoz.....these are the total no. of cases..(i.e no of ways birthday of 6 people can be distribute to 12 months, when each month can hv any no. of birthdays)..