what is p(3 or odd) when rolling a die?

1/2
2/3
3/4

The answer is 1/2. You have to use the union formula, P of A+ P of B- P of A intersect B.

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.