To have the next four players win, we would need to have the 30% chance to win occur four times in a row. This means that we should multiply the probability of success by itself the number of times we want a win to occur:
[tex]P=\frac{3}{10}*\frac{3}{10}*\frac{3}{10}*\frac{3}{10}=\frac{81}{10000}=0.0081[/tex]