Final answer:
To determine how many students can be expected to prefer E-mail, we need to calculate the number of students surveyed and make an educated guess based on general trends or data from other sources.
Step-by-step explanation:
To find out how many students can be expected to prefer E-mail, we first need to determine the total number of students surveyed. The question tells us that every tenth student in the lunch line was asked, so we can calculate the number of students surveyed by dividing the total number of students in the school by 10.
In this case, there are 684 students, so the number of students surveyed would be 684 / 10 = 68.4. Since we cannot have a fraction of a student, we round this number down to the nearest whole number, which is 68.
Next, we need to determine the proportion of students who prefer E-mail. Since the question does not provide this information, we cannot calculate an exact number. We can only make an educated guess based on general trends or data from other sources.