Records kept of a period of 30 weeks by a dietician at a cafeteria show the following weekly consumption of milk in gallons find the average number of gallons of milked consumed per week

milk in gallons 200 205 201 215 220 225 230 235 240
probability 3/30 4/30 6/30 5/30 4/30 3/30 2/30 2/30 1/30

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.

Uneed to add them up 27+18+23=68