GRE General Test: QR-871742 GRE Quantitative Reasoning
Assume that at a particular zoo, of all the animals are mammals, and of the mammals are allowed to interact directly with the public. If 24 mammals are allowed to interact directly with the public, how many animals in this zoo are NOT mammals?
of all the animals are mammals, and 
of the mammals are allowed to interact directly with the public. If 24 mammals are allowed to interact directly with the public, how many animals in this zoo are NOT mammals?