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- December 10th 2011, 07:09 AM #1

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## Two In One

Hi guys,

Here are my questions :-

1. If C and D are two non null sets, C - D equals ?

2. 72 matches are played. If each team plays 1 match with another team, total number of teams is ?

I have no idea about first question...so can u help me out with explanations??

Thanks in advance !

Regards,

deepz007

- December 10th 2011, 07:20 AM #2

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- December 10th 2011, 07:23 AM #3

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- December 10th 2011, 07:27 AM #4

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- December 10th 2011, 07:47 AM #5