A student committee on academic integrity has 132 ways to select a president and vice president from a group of candidates. The same person cannot be both president and vice president. How many candidates are there? Choose the correct option:
A) 7 B) 8 C) 9 D) 10 E) 12
xC1 * (x-1)C1= 132   x^2 - x - 132 =0   (X-12) (X+11) = 0   X= 12 , - 11   - 11 can't possible.   Hence 12 should be the answer   12
<result>E</result>
A student committee on academic integrity has 132 ways to select a president and vice president from a group of candidates. The same person cannot be both president and vice president. How many candidates are there?