A certain lab experiments with white and brown mice only. In one experiment, 4/9 of the mice are brown. If there are 20 brown mice in the experiment, how many mice in total are in the experiment?  Choose the correct choice from the following answers
A) 32
B) 26
C) 36
D) 28
E) 24
Let total number of mice = M   Number of brown mice = 4/9 M   Number of white mice = 5/9 M = 20   =&gt; M = 36   Answer 36
<result>C</result>
A certain lab experiments with white and brown mice only. In one experiment, 4/9 of the mice are brown. If there are 20 brown mice in the experiment, how many mice in total are in the experiment?