Question

In a forest 4/7 of all the trees are conifer and the rest are leaf-bearing. Among the leaf-bearing trees 7/15 are oak and 2/3 of these oaks are new. There are 160 old oaks in the forest. How many trees in all are in the forest?

Answer 1

(3/7) and (7/15) are oak.

(2/3)(7/15)(3/7)T are new oaks

(1/3)(7/15)(3/7)T are old oaks

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(1/3)(7/15)(3/7)T = 160

(1/15)T = 160

I believe 160 x 15 - 2,400.

My best guess is there are 2,400 trees in the forest.