Sometimes epiphora is not a result of excessive tear production but is a problem with tear drainage. Normally tears exit the eye through small holes called puncta, which leads to a duct called the nasolacrimal duct which empties out into the nose. This is why we have to blow our noses whenever we have a good cry.
Arithmetic (from the Greek á¼ÏÎ¹Î¸Î¼ÏÏ arithmos, number) is a branch of mathematics that consists of the study of numbers, especially the properties of the traditional operations between themâaddition, subtraction, multiplication and division.
Mean (or arithmetic mean) is a type of average. It is computed by adding the values and dividing by the number of values. Average is a synonym for arithmetic mean â which is the value obtained by dividing the sum of a set of quantities by the number of quantities in the set. An example is (3 + 4 + 5) Ã· 3 = 4. The average or mean is 4.