3 gentlemen and 3 gentlewomen are candidates for 2vacancies. A voter has to vote for 2candidates. In how many ways can one cast his vote?
Choose the correct choice from the following answers:  A) 8  B) 10  C) 15  D) 17  E) 19
There are 6 candidates and a voter has to vote for any two of them.   So, the required number of ways is,   = 6C2 = 6!/2!*4!   = 15.   15
<result>C</result>
3 gentlemen and 3 gentlewomen are candidates for 2vacancies. A voter has to vote for 2candidates. In how many ways can one cast his vote?