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 <kamakshi...@gmail.com>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 > kamakshi...@gmail.com > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to algogeeks@googlegroups.com. > To unsubscribe from this group, send email to > algogeeks+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > -- ----------------------------------------------------------------------- Puneet Goyal Student of B. Tech. III Year (Software Engineering) Delhi Technological University, Delhi ----------------------------------------------------------------------- -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.