A certain lab experiments with white and brown mice only. In one experiment, 2/5 of the mice are brown. If there are 12 white mice in the experiment, how many mice in total are in the experiment?
Answers:
A) 20  B) 12  C) 15  D) 18  E) 16
Let total number of mice = M   Number of brown mice = 2/5M   Number of white mice = 3/5 M = 12   =&gt; M = 20   20nswer 20
<result>A</result>
A certain lab experiments with white and brown mice only. In one experiment, 2/5 of the mice are brown. If there are 12 white mice in the experiment, how many mice in total are in the experiment?