If the Odds in Favor of an Event Occurring Is $\frac{2}{11}$

Multiple Choice

If the odds in favor of an event occurring is 9 to 2 , then the probability that the event will not occur is

A) $\frac{2}{11}$ .
B) $\frac{9}{11}$ .
C) $\frac{2}{9}$ .
D) $\frac{9}{2}$ .