Question

Park rangers catch, tag, and release 200 tule elk back into the wildlife refuge. Two weeks later they observe a sample of 150 elk, of which 5 are tagged. Assuming that the ratio of tagged elk in the sample holds for all elk in the refuge, how many elk are there in the park?

Answer 1

5/150 or 1/30 is your ratio so \[\frac{ 1 }{ 30}(n)=200\]n is the number of tule elk in the whole park. Solve for n by multiplying 30 into both sides