An unbiased sample is one in which every member of the group has an equal chance of being chosen.
2 answers:
You might be interested in
Answer: 4
Step-by-step explanation:
There are 4 terms,
This is a composite. Another way to write them is f(g(x)). Take the function g(x) and stick it in for x in f(x). Like this: 
. But we aren't done cuz there's some simplifying there to do. 
and canceling out the 3's we get just a simple x as our answer. The choice is the last one above as your answer.