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Japan is reported to have among the highest percentage of citizens

aged 60 years and over, at approximately 26.4 % (i.e. 26.4 % of its population falls within this age category).  If 49 individuals are randomly selected from the population, and X is the number of individuals out of 50 that are 60 or more years old, what is:
a)  The mean of X?

Step-by-step answer

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