Question

A professor using an open source introductory statistics book predicts that 10% of the students will purchase a hard copy of the book, 55% will print it out from the web, and 35% will read it online. At the end of the semester he asks his students to complete a survey where they indicate what format of the book they used. Of the 200 students, 25 said they bought a hard copy of the book, 85 said they printed it out from the web, and 90 said they read it online.

Answer 1

12.5% bought a hard copy. 42.5% printed it from the web. And 45% read it online.

Step-by-step explanation: Since there are 200 students in total, think of 200 as 100% of students. You would divide 25/200 which equals 0.125 then multiply 0.125 times 100 which is 12.5 or 12.5%. Same process with the other numbers (85/200)x100=42.5 (90/200)x100=45. Hope this is what the question was asking