Merge branch 'bugfix' of github.com:gajennings/webwork-open-problem-library into bugfix

Author: gajennings

Contrib/DouglasCollege/README.md

@@ -3,7 +3,6 @@ This subdirectory contains the problems contributed by Douglas College, British
 Contributors (github):
 * kirkeyj
 * adentremont
-* GraemeDockrill
-* IvyaThalenmourn
 * msekatchev
-* capacapac
+* ishookie
+

Contrib/UBC/README.md

@@ -15,4 +15,5 @@ Contributors (github):
 * capacapac
 * robynnewell
 * monabe
-* zalimo01
+* ishookie
+

Contrib/USask/README.md

@@ -4,6 +4,6 @@ Contributors (github):
 * seanmaw
 * kirkeyj
 * adentremont
-* GraemeDockrill
-* IvyaThalenmourn
+* msekatchev
+* ishookie
 

OpenProblemLibrary/Rochester/setProbability7RandomVariables/ur_pb_7_9.pg

@@ -39,7 +39,7 @@ $y = $total/4;
 BEGIN_TEXT
 
 Four buses carrying \($total\) high school students arrive to Montreal. The buses carry, respectively, \($a\), \($b\), \($c\), and \($d\)
-students. One of the studetns is randomly selected. Let \(X\) denote the number of students that were on the bus carrying this randomly
+students. One of the students is randomly selected. Let \(X\) denote the number of students that were on the bus carrying this randomly
 selected student. One of the \(4\) bus drivers is also randomly selected. Let \(Y\) denote the number of students on his bus. Compute the
 expectations of \(X\) and \(Y\):
 $BR