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[Post New]18 Mar 2008 22:09:54 IST
    Subject: another ncert qs
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kasirajan.1990 (1349)

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Olaaa!! Perrrfect answer. 257  [289 rates]
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E1 = lost card in a diamond

E2 = lost card nt a diamond

P(E1) = 13/52

P(E2) = 39/52

E = 2 cards drawn frm the remainin pack r diamonds

P(E/E1) = 12C2/51C2 = 12x11/51x50

P(E/E2) = 13C2/51C2 = 13x12/51x50

required propability

-----> P(E1/E) = P(E/E1) P(E1) / { P(E/E1) P(E1) + P(E/E2) P(E2)}

= 11/50
kasirajan



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