Calculating relative frequencies in a contingency table

Frequency is the number of objects in a certain set.

Relative frequency is the fraction of the frequency of objects in a certain set to the total frequency of objects. This can be written as a fraction, decimal (proportion), or percent. Relative frequency is sometimes used in place of probability.

For example, suppose an urn contains 3 red balls and 5 white balls. The frequency of red balls in the urn is 3; whereas, the relative frequency of red balls with regard to all balls in the urn is 3/8 or 0.375 (meaning 37.5% of the balls in the urn are red). This is also the probability of choosing a red ball from that urn with one pick.

Note: Tables in ALEKS are not provided with totals. It will help if you find those first.