A certain lab experiments with white and brown mice only. In one experiment, 2/3 of the mice are white. If there are 12 brown mice in the experiment, how many mice in total are in the experiment?  Select:
A) 39	B) 33	C) 26	D) 21	E) 36
Let total number of mice = M   Number of white mice = 2/3 M   Number of brown mice = 1/3 M = 12   =&gt; M = 36   Answer 36
<result>E</result>
A certain lab experiments with white and brown mice only. In one experiment, 2/3 of the mice are white. If there are 12 brown mice in the experiment, how many mice in total are in the experiment?