### Home > INT2 > Chapter 12 > Lesson 12.2.4 > Problem12-131

12-131.
1. Twelve students will be chosen at random from the 900 students at Rolling Meadows High School to serve as the Judicial Board for minor student infractions. Homework Help ✎

1. How many different Judicial Boards are possible?

2. Mariko hopes to be on the board. How many possible boards include her?

3. What is the probability (in percent) that Mariko is chosen for the board?

$900 {\large{C}} 12 \approx 5.48 \cdot 10^{26}$

$899 {\large{C}} 11 \approx 7.30 \cdot 10^{24}$

Divide the number of boards containing Mariko by the number of possible boards.