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191-B3-2

3. Ann is trying to take a survey on hobbies of her school students. Determine with
reasons whether the following methods are random sampling or not.
a. Ann asked 15 of her close friends.

b. Ann asked 30 3rd grade students.

c. Ann asked 20 students from the dance club.

d. Ann asked 30 students that were randomly selected from the entire school
students by the computer.
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