Question 1077656
The mean of the population is 209/5=41.8
The mean of all samples of n=2 will be:
48.5
46
55.5
46
33.5
31
40.5
43
40.5
33.5
sum is 418, and mean is 41.8, same as the population mean.
Each one of the 10 samples will be a point estimate of the sample mean.
31 (0.1 probability)-3.1
33.5 (0.2)----------6.7
40.5 (0.2)----------8.1
43 (0.1)------------4.3
46 (0.2)------------9.2
48.5 (0.1)----------4.85
55.5 (0.1)----------5.55
That sum is 41.8
Not required but the standard deviation of the original population is 11.855
The sd of the 10 samples is 7.26.  This turns out to be 11.855/sqrt(2), and this is a basic property of the sampling distribution from a population. It will have the same mean as the population, and its sd is sd of pop, or 
sigma/sqrt(n), the sample size.  This is one of the most important concepts in statistics.