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Georges
Louis Leclerc Comte de Buffon (07.09.1707.-16.04.1788.)
Buffon's
original form was to drop a needle of length L at random on
grid of parallel lines of spacing D.
For
L les than or equal D we obtain
P(needle
intersects the grid) = 2 • L / PI •
D.
If
we drop the needle N times and count R intersections we obtain
P
= R / N,
PI = 2 •
L •
N / R •
D.
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