Contingency Tables · Exercise 12

Use the information in the to answer the next eight exercises. The table shows the political party affiliation of each of 67 members of the U.S. Senate in June 2012, and when they would next be up for reelection.
$$\begin{array}{ccccc}\text{Up for Reelection:}& \text{Democratic Party}& \text{Republican Party}& \text{Other}& \text{Total}\\ \text{November 2014}& \text{20}& \text{13}& \text{0}& \\ \text{November 2016}& \text{10}& \text{24}& \text{0}& \\ \text{Total}& & & & \end{array}$$

What is the probability that a randomly selected senator had an Other affiliation?

OpenStax, Statistics · §3.4 Contingency Tables · Exercise 12