It's called their "sum".
Mean.
its called a period
This type of average is called the mean.
The numerical average of a group of numbers is the ratio of the sum of group of numbers to the total amount of numbers. This is also known as the mean.
It is called the 'mean average'
It's called their "sum".
median
Mean.
There is no specific name.
450, 600, 500, 700, 377, 370
its called a period
It is called the "least common multiple".
This type of average is called the mean.
The average of a group of numbers is(the sum of all the numbers in the group)/(how many numbers there are in the group)
By adding up all the numbers in the group and dividing by the number of numbers in the group.
Groups 1 and 2 are +1 and +2 respectivelly.. Group 3-12 have variable oxidation numbers - they are the so-called transition metals. Group 14-17 have variable oxidation numbers -even group 18- has- there are a number of different compounds of Xe for example. Group 1 and 2 have some strange compounds such as Cs11O3 . A better question might be which group doesn't have variable oxidation numbers!