Bayes theorem...
Approach :
P(pen from packet 1 | Blue) =2/3 (from Bayes rule)
P(pen from packet 2 | Blue) =1/3
Req prob = 2/3 + 1/3 . 1/2
=5/6
On Fri, Aug 5, 2011 at 6:02 PM, abhishek iyer <[email protected]>wrote:
> @Nishant.. Can u please explain ur approach.. I think its as per mentioned
> above 1/2...
> On 5 Aug 2011 21:30, "nishaanth" <[email protected]> wrote:
> > 5/6
> >
> > On Fri, Aug 5, 2011 at 5:55 PM, Rahul Jain <[email protected]>
> wrote:
> >
> >> i agree with puneet. 1/2
> >>
> >>
> >> On Fri, Aug 5, 2011 at 9:18 PM, Puneet Goyal <[email protected]
> >wrote:
> >>
> >>> 1/2
> >>>
> >>> you got the blue pen so it is for sure that is one of the first two
> >>> packets, so you are left with a black pen and a blue pen and you have
> to
> >>> find the probability of finding a blue pen among them
> >>>
> >>> On Fri, Aug 5, 2011 at 9:14 PM, Kamakshii Aggarwal <
> >>> [email protected]> wrote:
> >>>
> >>>> I was given 3 packets, with 2 pens each.
> >>>>
> >>>> 1st Packet has 2 blue pens.
> >>>>
> >>>> 2nd Packet has 1 blue pen,1 black pen.
> >>>>
> >>>> 3rd Packet has 2 black pens.
> >>>>
> >>>>
> >>>>
> >>>> I took any one packet and pulled out one pen. It turned out to be a
> blue
> >>>> one.
> >>>>
> >>>> What is the probability that the next pen from the same packet will
> >>>>
> >>>> also be a blue one?
> >>>>
> >>>> --
> >>>> Regards,
> >>>> Kamakshi
> >>>> [email protected]
> >>>>
> >>>> --
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> >>>>
> >>>
> >>>
> >>>
> >>> --
> >>> -----------------------------------------------------------------------
> >>> Puneet Goyal
> >>> Student of B. Tech. III Year (Software Engineering)
> >>> Delhi Technological University, Delhi
> >>> -----------------------------------------------------------------------
> >>>
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> >>
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> >
> >
> >
> > --
> > S.Nishaanth,
> > Computer Science and engineering,
> > IIT Madras.
> >
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--
S.Nishaanth,
Computer Science and engineering,
IIT Madras.
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