How to add the numbers of the series together to form a total in excel?

How to add the numbers of the series together to form a total in excel?

The easiest way
Select this column of data
Press ALT and = at the same time

For a series of equidistant continuous variables, the last group is the open group, and the lower limit is 200. It is also known that the median value of the adjacent group is 170. To find the median value of the last group, the specific method is to find out~

Last group: minimum 200
Penultimate group: median 170
Because the sequence is equidistant and continuous, the values of any set value are the same
The median value of the penultimate group was 170, and the second group was 150, 160, 170, 180, 190
Then the final group is: 200, 210, 220, 230, 240
Obviously, the median is 220

If the lower limit value of a group is 100 and the upper limit value is 150, the median value of the group is ()
A．100 B．150
C．125 D．25

c