The best way the department can obtain the a simple random sample is by randomly selecting 128 students.
Refers to a sampling method where every member has an equal chance of being picked.
= 10% x 1,280
= 128 students
To perform simple random sampling, the department can randomly select 12e students from the 1,280.
Find out more on simple random sampling at https://brainly.com/question/3139978.