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Finding Means of Samples

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Each of those days: 10,3, 2. Assume that the sample of size 2 are randomly selected with replacement form this population of three values.

a) List the different possible samples and find the mean of each of them. Select the correct choice below and fill in the answer boxes within your choice.
Sample - Mean x

A
10-10= ___
10-3=_____
10-2=_____
3-3=______
3-2=______
2-2=____
B-
Sample - Mean x
10-3=____
10-2=____
3-2=____

C
Sample - Mean x
10-3= ____
10-2=____
3-10=____
3-2=____
2-10=____
2-3=____

D
Sample - Mean x
10-10=____
10-3=____
10-2=____
3-10=____
3-3=____
3-2=____
2=10=____
2-3=____
2-2=____

I think the answer is D, however I do not know how to get the mean for each

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