認識癌症

A study analyzed the results of an exam taken by 18-year-olds in a certain country. The exam had 8 multiple choice questions with 5 possible answers for each question. 50% of test takers scored between 1-4 correct answers, while 90% scored between 1-7 correct answers. The questions covered 7 academic subjects and 1 question about a civic issue, with the distribution of question topics following a specific breakdown.