Given data:
The given numbers of students are n=16.
The expression for the probability that you are not one of the first four students chosen is,
[tex]\begin{gathered} P(x)=(1-\frac{1}{16})(1-\frac{1}{15})(1-\frac{1}{14})(1-\frac{1}{13}) \\ =\frac{15}{16}\times\frac{14}{15}\times\frac{13}{14}\times\frac{12}{13} \\ =\frac{12}{16} \\ =\frac{3}{4} \end{gathered}[/tex]Thus, the probability that you are not one of the first four students chosen is 3/4.
