When baking cupcakes for his class of 21 students sammy needed 2 eggs now he wants to bake cupcakes for the up coming science fair if he expects 336 people to attend the science fair how many eggs will he need

Hey will need 168 eggs

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.