| We want to estimate how many leaves grow on this Birch tree |
We choose a sample area of leaves, and mark it |
A close-up of the sample area of leaves |
The sample is divided into ten parts |
| We count 120 leaves in one part - so guess 1,200 in the sample |
64 samples of 1,200 means 76,400 leaves in this picture |
There could be a million leaves on this tree! |
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