a lot of Thank you ...(Rofl)
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a lot of Thank you ...(Rofl)
As to the first: look at the probabilities of the complements:Quote:
Originally Posted by Narek
P(U\E) = ???
P(U\F) = ???
and then look at P(U\(E n F)).
(where U is the "universe", i.e., all events).
As to the second: does it really matter which birthday person1 has? So, say it's January 13. Then look at the birthday of person2.
Refer to the link below, you will be able to solve the 2nd problem.
Birthday problem - Wikipedia, the free encyclopedia
I dont get the point .... can you solve it?(Thinking)
Try first: what's the probability that E does not occur, i.e. P(U \ E) ?Quote:
Originally Posted by Narek
Likewise, the probability that F does not occur?
What's the sum of those?
What has that to do with the probability that (E n F) does not occur?
we dont know what day is for the first person, so we consider it as 1st january. and now we say, the probability of the second person having the same birthday is :
P= 1 / 366
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is this True???? thank you (Nod)
Yes, that's correct.Quote:
Originally Posted by Narek
for the first one, no matter how hard I try, I dont understand the concept ... I need to see the solution, please (Wink)
any suggestion??? any guide? (Lipssealed)
Quote:
Originally Posted by Narek
CB