A multiple choice test has 6 questions and each question has 4 choices. In how many ways could a student get exactly one of the questions wrong? Assume he answers all the questions.
tjbrewer | Certified Educator
The student has 24 different possible answers. Of those answers 6 are correct. 24-6=18. There are 18 wrong answers, and therefore 18 opportunities to answer any one of the questions wrong.