9. (10 points) In a certain exam, 153 people scored no more than 30 points, with an average of 24 points; 59 people scored no less than 80 points, with an average of 92 points; those who scored more than 30 points had an average of 62 points, and those who scored less than 80 points had an average of 54 points. How many people in total participated in this exam?
【Solution】Solve: $[153 \times(54-24)+59 \times(92-62)] \div(62-54)+153+59$
$$
\begin{array}{l}
=[4590+1770] \div 8+212 \\
=6360 \div 8+212 \\
=795+212 \\
=1007 \text { (people) }
\end{array}
$$

Answer: A total of 1007 people participated in this exam.
Therefore, the answer is: 1007.