i hv googled it and the answer is like The enemy aircraft will be brought down even if one of the four shots hits the aircraft.
The opposite of this situation is that none of the four shots hit the aircraft. The probability that none of the four shots hit the aircraft is given by (1-0.7)(1-0.6)(1-0.5)(1-0.4) = 0.3*0.4*0.5*0.6 = 0.036 So, the probability that at least one of the four hits the aircraft = 1 – 0.036 = 0.964. On Mon, Aug 29, 2011 at 5:54 PM, vishwa <[email protected]> wrote: > is it 0.55... > > > On Mon, Aug 29, 2011 at 5:49 PM, Abhishek Yadav < > [email protected]> wrote: > >> i guess it would be .... 0.7 + 0.3*0.6 + 0.3*0.4*0.5 + 0.3*0.4*0.5*0.4 >> =.964.....correct me if i am wrong.?? >> >> >> On Mon, Aug 29, 2011 at 5:34 PM, Naman Mahor <[email protected]>wrote: >> >>> An anti aircraft gun can fire four shots at a time. If the probabilities >>> of the first, second, third and the last shot hitting the enemy aircraft are >>> 0.7, 0.6, 0.5 and 0.4, what is the probability that four shots aimed at an >>> enemy aircraft will bring the aircraft down? >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Algorithm Geeks" group. >>> To post to this group, send email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]. >>> For more options, visit this group at >>> http://groups.google.com/group/algogeeks?hl=en. >>> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Algorithm Geeks" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/algogeeks?hl=en. >> > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
