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[Post New]23 Mar 2008 15:46:20 IST
    Subject: Re:Probability.........different methods
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akhil_o (2709)

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Olaaa!! Perrrfect answer. 435  [702 rates]
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3 times hit:

5C3*(3/4)3(1/4)2

4 times hit:

5C4*(3/4)4(1/4)1

5 times hit:

(3/4)5

addding all these we get required P

P=5C3*(3/4)3(1/4)2+5C4*(3/4)4(1/4)1+(3/4)5
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