In a certain class of students, there are 12 bous from Wilmette, 4 girls from Kenilworth, 9 girls Wilmette, 7 boys from Glencoe, 5 boys from Kenilworth and 5 girls from Glencoe. If the teacher calls upon a student to answer a question, what is the porbabilty that the student will be from Kenilworth? Solution 9/42.