1/5 of students in a school have no brothers or sisters. of the remaining students, 40% have 1 brother or sister. what percent of all students have more than 1 brother or sister?

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.