# Math Help - Circles and arrows problem

1. ## Circles and arrows problem

Hi,

There are n circles (each of different size) drawn on a board at randomly chosen locations. Assume that the area of the i-th circle is 1/i (we assume that the space is unit, i.e., the probability that a randomly placed arrow falls inside the i-th circle is 1/i).

An arrow x is thrown on the board and some circles contain it and the remaining circles do not contain it. What is the probability that another arrow y thrown on the board is contained by exactly the same circles that contain x and is not contained by exactly the same circles that do not contain x. The events x and y are independent.

If the problem is too complex, some assumptions can be made.

Any advice and help will be highly appreciated. Thanks

Best Regards,
Aamir

2. ## Re: Circles and arrows problem

Any ideas????