<PRE><B>Question 982006</B>
.
(100%-37.5%)/2)=31.25%
There were 31.25 percent of each intermediate and expert trails.
.
(0.3125)(48)=15 There were 15 each expert and intermediate trails.
.
(0.375)(48)=18 There were 18 beginner trails.
.
CHECK:
48 total trails=15 expert + 15 intermediate + 18 beginner trails
48 total trails=48 total trails</PRE>