File:Rice Poisson Colored.jpg

Randomly scattered rice on ground. WLOG part of the image and size of grid was chosen to give one grain per square, i. e. mean expectation λ=1, see en:Poisson distribution. In this case we can derive e: 1/e == probability to find no or one grain per square.

Statistics: number of squares containing n grains:

grains  number   color
----------------------
    0       23     red
    1       25  yellow
    2       12   green
    3        2    blue
    4        1   lilac
    5        1    grey

Total of 64 grains in 64 squares, i. e. λ=1

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