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Rocco is also an avid outdoorsman. Today he counted 165 total tree rings of three fallen birch trees. What is the mean age of all three trees?

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Interesting fact:

The Earth is home to over 60,000 different species of trees! Of those, 60% can only be in found in a single country, meaning no other country has that same species of tree. In total, there over 3 trillion trees on the planet.

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