MCQ Practice Mathematics 📖 The present ratio of students to teachers at a certain school is 30 to 1. If the student enrollment were to increase by 50 st... Favorite Practice Add to Book Explanation & Answer Detailed explanations and answers are restricted. Unlock full access by logging in to your account. 🔒 Unlock the detailed explanation and answers Log In / Sign Up This question appeared in Assistant Director Question Bank 2015 Question 65 Assistant Director Question Bank 2015 Question 65 Assistant Director Question Bank 2015 Question 65 PreviousThe angles of a pentagon are in ratio 9 : 10 : 14 : 15. What is the sum of measures of the smallest and largest angles? NextThe ratio of the number of red balls, to yellow balls, to green balls in an urn 2 : 3 : 4, What is the probability that a bal...