In each of Problems, assume that the variable under consideration has a density curve. Note that the answers required here may be only approximately correct. The percentage of all possible...

In each of Problems, assume that the variable under consideration has a density curve. Note that the answers required here may be only approximately correct.

The percentage of all possible observations of a variable that lie between 25 and 50 equals the area under its density curve between _______ and _______, expressed as a percentage.