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        riddles >> easy >> Mix alphabets and numbers
        
(Message started by: mistaken_id on Mar 14^th, 2009, 9:01am)

Title: Mix alphabets and numbers
Post by mistaken_id on Mar 14^th, 2009, 9:01am

Suppose you a list of alphabets A,B,C,......Z and another list of numbers from 1,2,.....10

How many ways can you combine the above two lists into a single list? The constraint is after mixing partial order between alphabets, and partial order between numbers should still be retained?

That is A should always come B, and B before c.......

and 1 before 2,,,2 before 3........ so on

Title: Re: Mix alphabets and numbers
Post by Aryabhatta on Mar 14^th, 2009, 11:10am

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You have total 36 spots and have to choose 10 for the numbers so 36 choose 10 seems to be right.

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