Answer
The number of ways such jokes can be delivered if George Carlin’s joke is delivered first and Jerry Seinfeld’s last is $24$
Work Step by Step
We know that the Fundamental Counting Principle says that the number of ways in which a series of things occurs in succession can be computed by multiplying the number of ways in which they may occur.
Thus, using the Fundamental Principle of Counting:
$\begin{align}
& 4!=4\cdot 3\cdot 2\cdot 1 \\
& =24
\end{align}$