Calculate joint probability interchanging the terms I've just started to lean probability, and I have found the following very useful book: OpenIntro Statistics. One page 88 you have the table: ![enter image description here]( And one page 89 you can find the following two tables: ![enter image description here]( If in table 2.14, I want to calculate the joint probability using teen college as the first probability, instead of using parents: teen college and parents degree teen college and parents not teen not and parents degree teen not and parents not How can I calculate those joints probabilities?

They are the same. The order of the two events in the "and" does not matter. This is because $A\cap B = B\cap A$, so $P(A\text{ and } B) = P(B\text{ and } A)$ (i.e. $P(A\cap B) = P(B\cap A)$).

For example, $P(\texttt{teen not}\text{ and }\texttt{parents not}) = P(\texttt{parents not}\text{ and }\texttt{teen not})$.