7.27 Consider selecting a household in rural Thailand at random. Define the random variable x to be x 5  number of individuals living in the selected household Based on information in an article that appeared in the Journal of Applied Probability (2011: 173–188), the probability distribution of x is as follows:

x 1 2 3 4 5 6 7 8 9 10 p(x) .140 .175 .220 .260 .155 .025 .015 .005 .004 .001 Calculate the mean value of the random variable x.

(Hint: See Example 7.9.)