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[Post New]23 Mar 2008 15:33:06 IST
    Subject: Probabilty
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akshay.khare91 (585)

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Olaaa!! Perrrfect answer. 93  [153 rates]
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if 20 is at middle then the starting two nos. should be picked from
1-19 therefore no. of ways of selecting are 19C2
and the last two nos. should be picked from (21-50)
therefore no. of ways of selecting = 30C2 .

therefore favorable cases= 19C2*30C2

total ways = 50C5

therefore probability = 19C2*30C2 / 50C5
IMPOSSIBLES ARE OFTEN UNTRIED...
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