At a certain university, 72.4% of 21,048 students were undergraduates in fall semester of a given year. How many undergraduates were there?

The major difference is that a histogram is only used to plot the frequency of score occurrences in a continuous data set that has been divided into classes, called bins.  bar charts, on the other hand, can be used for a great deal of other types ofvariables  including  ordinal  andnominal  data sets.

Im pretty sure it’s the first one