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Spider and Fly (Posted on 2003-11-25) Difficulty: 3 of 5
A spider eats 3 flies a day. Until the spider fills his quota a fly has a 50% chance of survival if he attempts to pass the web.

Assuming 5 flies have already made the attempt to pass, what is the probability that the 6th fly will survive the attempt?

See The Solution Submitted by Ravi Raja    
Rating: 3.6250 (8 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re: Easier than it sounds... | Comment 17 of 21 |
(In reply to Easier than it sounds... by Magick321)

'the previous flies cannot and will not affect the sixth's chances... '
They do.
You're wrong.
  Posted by Lee on 2003-12-03 23:57:12

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