![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
Write the rate of junk E-mails to total E-mails for each E-mails in simplest form.
\Rate of first column is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9141712ff2da0e2f3a689966705b1b7c.png\")
.
Rate of second column is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a20817483963611b31ffafb1bd131702.png\")
.
Rate of third column is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a767aeb1cfa20bb659b0d39cb2c17ae7.png\")
.
Rate of fourth column is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=bcbb07a77567a7fead39534722c39bd2.png\")
.
All the rates are equal.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The junk E-mails is proportional to total E-mails.