Posted by **David** on Monday, April 26, 2010 at 6:40pm.

At the National Zoo, 12 out of 25 exhibits contain a mammal. Assuming that there are 375 exhibits, how many many are mammals?

A) 11

B) 32

C) 132

D) 300

Here is what I am doing:

12/25 = x/375

375 * (12/25) = (x/375) * 375

180 = x

But 180 isn't an option

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