, someone mails your family an assortment of apples, shown below. What's the probability that your mom picks and eats a red one; your dad picks and eats a yellow one; and then your brother picks and eats a red one?

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.