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![[Post New]](/templates/default/images/icon_minipost_new.gif) 23 Mar 2008 15:23:28 IST
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2 numbers are less than 20(ie from 1-19), 2 more than 20 such that middle is feixed at 20
ie(21,50)
so no of ways of choosing
=19C2*30C2
so P=19C2*30C2/total=19C2*30C2/50C5
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