Question 1103297
<pre>
5 a's + 11 b's + 19 c's + 6 d's = 41 passing students,

Therefore there were 45-41 = 4 f's.

{{{matrix(1,6,

5, 
"a's,", 
11, 
"b's,", 
19, 
"c's,")/matrix(1,10,
5, 
"a's,", 
11, 
"b's,", 
19, 
"c's,", 
6, 
"d's,",
4,
"f's")}}}{{{""=""}}}{{{35/45}}}{{{""=""}}}{{{7/9}}}

Edwin</pre>