1.

Romeo and Juliet write love-letters to none but to each other. In a given period of time, Romeo writes 4 letters and Juliet writes 2 letter. During this period, at any given point of time Romeo writes greater than or equal to the number of letter written by Juliet. Find the number of ways of writing love-letters to each other.

Answer»

10
8
6
9

Answer :D


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