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[Post New]18 Mar 2008 22:00:28 IST
    Subject: ncert qn
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kasirajan.1990 (1084)

Blazing goIITian

Olaaa!! Perrrfect answer. 204  [236 rates]
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E1 = red ball transffered frm bag1 to bag 2
E2 = black ball transffered frm bag1 to bag2

E1 n E2 r mutually exhaustive n exclusive

P (E1) = 3/(3+4)

P(E2) = 4/(3+4)


E = red ball is drawn frm bag2

P(E/E1) = 4+1/(4+1)+5 = 5/10

P(E/E2) = 4/4+(5+1) = 4/10


required propability = (usin bayers theorem) = 16/31
kasirajan



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