A student received a 75% on an exam. If there were 20 questions on the exam, which ratio would show the number of questions answered correctly to the total number of questions? A. 20:5 B. 5:20 C. 15:20 D. 20:15
For this case what you can do is the following rule of three: 100% ---> 20 75% -----> x Clearing the value of x we have: x = (75/100) * (20) x = 15 This number represents the number of correct answers. We have then that the ratio is: 15:20 Answer: A ratio that would show the number of questions answered correctly to the total number of questions is: C. 15:20
