Alexa can blow 15 balloons in 20 minutes. Sara can blow 18 balloons in 25 minutes, Shirley can blow 16 balloons in 21
minutes and Sam can blow 12 balloons in 23 minutes.

Assuming that all balloons are blown to the same size, who can blow
balloons at the fastest rate?

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.