The odds in favor of an event are 2:9. What are the odds against the event?

The odds against the event are 9:11.

Step-by-step explanation:

The odds being in favor and against an event are complemmentary, that is, their sum is 100% = 1.

The odds in favor of an event are 2:9.

So for each 2 times the event will happen, it wont happen 9 times, in a total of 2 + 9 = 11

So the odds against the event are 9:11.

well there are two answers for that.

1: you need 120 ones then that will equal up to 120.

2: you could also do one 100 and 2 tens.

those are the answers that i have thought of.