The arithmetic average describes the average trend of a set of data and is the quotient of the sum of all data divided by the number of data. When used in statistics, it should be noted that when there are extreme values, ambiguous data or different quality data, the arithmetic average can not be calculated.
According to the above definition, which of the following options is suitable for calculating arithmetic averages?
According to the statistics of a community, the average age of the residents in this community includes 204 children under 10 years old and 26 people over 90 years old.