Bar and bat mitzvah mean, literally, son and daughter of the commandment.. Bat mitzvah is Hebrew, while bar mitzvah, historically a much earlier ceremony, is Aramaic. The word bar is the Aramaic equivalent of the Hebrew ben (son of) .
In math, the mean is the average of a set of numbers. To determine the mean, add all numbers in a set and take this answer and divide it by how many numbers are in the set. Continue Reading.
Definition of Mean. Mean of a set of numbers is the sum of the numbers divided by the number of items in the list. Mean of a set of n numbers a1, a2, a3, ..., an is given by. Mean can also be called as average or arithmetic mean.