Author 
Topic 

raghu
Senior Member
USA
37 Posts 
Posted  10/10/2010 : 10:14:45

If mixed doubles tennis matches are to be arranged between 7 couples and if no husband and wife want to be in the pair how many ways can you set up the teams? 


Subhotosh Khan
Advanced Member
USA
9117 Posts 
Posted  10/11/2010 : 19:56:45

quote: Originally posted by raghu
If mixed doubles tennis matches are to be arranged between 7 couples and if no husband and wife want to be in the pair how many ways can you set up the teams?
Raghu  how is it that you never share your work/thought?
We do not know where to begin to help you.
Hint  Each husband can be teamed up with how many wives?
Please share your work with us, indicating exactly where you wre stuck  so that we may know where to begin to help you.



raghu
Senior Member
USA
37 Posts 
Posted  10/11/2010 : 21:30:09

Subhotosh, This is my thought. 2 out of 7 men can be permuted in 7p2 ways and 5p2 for women. Once you choose 2 men and 2women, you can have 4 teams. Therefore 4 * 7p2*5P2. This is my thinking. 



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